How long it takes to travel by train from various cities

Estimate the costs of an ancient Roman vacation

Thanks to a sophisticated system of roads, Romans could travel great distances for their Roman holidays. This interactive resource from Stanford allows you to create fictional journeys around the empire, seeing approximate routes, costs, and time.

Visualizing New York City's public transportation commutes

New York City is one of the largest cities in the world, and transports one of the largest numbers of commuters on a daily basis. This data visualization tells the stories of those commuters, showing the varying volume of travelers throughout the week and day, where they are going, and maps of high-traffic areas like stadiums and midtown. Dive into the data here.

Stanford built a Google Maps for the Roman Empire, revealing how much it cost to travel in the ancient world

Visualizing the trans-Atlantic slave trade in two minutes

This animation shows all recorded slave shipments from the 16th to 19th centuries, conceptualizing not only the slave trade with America but South America as well.

Compare the true size of any country

This interactive lets you drag any country across the conventional Mercator projection to compare its true size to others. Africa, which appears similar in size to Greenland on standard maps, is actually close to 15 times larger. It's a great way to recalibrate your assumptions about world geography.

See the progress of the war in this interactive, visual timeline

Follow the progress Russian/Ukrainian War through this interactive map. Watch as events develop, get a daily overview of movements, and switch back and forth between different dates and time periods during the conflict. Results will change in real time and depending on all available information about troop movements and more.

A map of Barcelona from 150 BCE to 2010

Watch Barcelona evolve from Iberian settlements in 150 BCE to Spain’s second-largest city in the modern day by toggling this chronological series of 27 maps. Accompanied by a short contextual blurb, each map shows Barcelona’s steady urbanization over more than two millennia. For those captivated by the interactive, read this interview with one of the project’s key cartographers. He discusses how the mega-map was created and what it reveals about Barcelona’s history.

Explore a worldwide ranking of smart cities

This interactive site evaluates residents' perceptions of the infrastructure and technologies available to them across 146 cities to produce a ranking based on a Smart City Index. Users can utilize the City Comparison feature to compare their city with others around the world.

The most expensive EU countries

Among countries in the European Union, Luxembourg has the highest prices (52% higher than the EU average). Romania seems like it's the cheapest option in the EU at 46% below the EU average. Want to see how other countries such as Italy, France and Germany rank? Explore this color-coded map to learn more.

Ingenuity and advanced engineering have allowed trains to overcome extreme landscapes

The Jungfrau Railway utilizes electric trains powered by hydroelectric energy to ascend the Swiss Alps, while Poland's Elbląg Canal hauls ships along cable-powered tracks driven by waterwheels. Germany's Wuppertal monorail navigates bends as it glides over a river valley, and New Mexico's Holloman High-Speed Test Track can achieve speeds of Mach 8.6 for rocket sleds.

Visualize your city’s annual daylight map

Type in your town or region and see sunrise and sunset for each day of the year. A separate view shows the number of hours of day versus night for each day. Search a city far north like Oslo, Norway, and compare its graphs to one near the equator (like Singapore).

Why high-speed rail hasn't worked in the US

High-speed rail connects cities across Europe and Asia, but American attempts have faced ballooning costs and delays. California's failed attempt to connect San Francisco and Los Angeles is the most prominent example of the dysfunction.

Mapping migrations of hundreds of bird species

The birds we see throughout the year are long distance fliers, often traveling over thousands of miles to reach optimal nesting grounds, better feeding, and more. This thorough interactive map tracks over 450 types of bird on their annual migrations, depicting both their route as well as some of the conservation hurdles each species faces. Fly along with your favorite bird here.

A map of WWII refugees and their stories

Trace the paths of different people and families on this interactive map as they made their escape from the Nazi regime. Primary and secondary sources like letters, documents, memoirs and diaries, photos, interviews, and news clippings showed how many found a path to freedom, from the Kindertransport to individual stories.

Explore a map of every charging station in the US and Canada

An electric vehicle owner's main fear running out of power before getting to their final destination. Using this interactive, users may identify stations and their charger type to map fuel corridors for EV road trips.

An interactive look at your own life through demographics

This interactive site allows you to understand the journey of your life in numbers and dates. World Data Lab asks users to enter their date of birth, country of birth, and sex at birth. The site then provides an interactive page tailored to your...

Visualize how data becomes organized through a variety of sorting algorithms

This interactive shows how different algorithms shift elements in a randomized set to order them from smallest to largest. By comparing the different procedures and their corresponding functions, users can explore how runtimes vary across algorithms that complete the same task.

The Channel Tunnel consists of an underwater network of over 200 kilometers in length

The passage beneath the English Channel between England and France includes three tunnels, crossover chambers, emergency passages, and air ducts. Burrowing teams in either country consistently checked their coordinates to ensure they would meet within two centimeters of each other.

Visualize the path of every solar eclipse from 1900 to 2099 and see what each looks like when observed from different locations on Earth.

In 1914, the Financial Times asked readers to redraw Europe for cash prizes

Two months in World War I, the newspaper invited readers to sketch postwar borders and submit peace terms for cash prizes. The contest captured public attempts to predict a new world order and foreshadowed modern crowdsourced forecasting. It's a wild look at how uncertain Europe's future was at the time.

See nine airplane models that transformed aviation

This visual guide jumps over the dawn of modern air travel and begins with the open-cockpit biplane flown by the first scheduled airline, the St. Petersburg-Tampa Airboat Line. (Some users may experience a paywall.)

Visualizing Einstein's special relativity

Before Einstein developed his theory of general relativity, he worked out what is known as special relativity—or why time is experienced different for different observers. The breakthrough rests on his theory that light travels at a constant...

An interactive guide to the cardiovascular system

The cardiovascular or circulatory system moves blood throughout the body, ensuring cells have necessary nutrients and removing any waste. Click through this interactive 3D guide to explore the system as it crisscrosses the body via arteries, veins, and capillaries. This guide also includes similar breakdowns of the body and its other processes.

Track every cruise ship in real time, with itineraries and accident history

CruiseMapper is a live global tracker covering hundreds of vessels across major cruise lines. The site layers in port schedules, cabin-level deck plans, repositioning voyages, and a searchable database of 15 incident types—fires, groundings, virus outbreaks, drug smuggling, passenger deaths, and more.

Take a drone tour of a Tesla factory

The first of Tesla's large-scale European manufacturing plants for its electric vehicles was opened in Berlin in 2022. It—along with other facilities in Nevada, New York, Texas, and Shanghai—collectively manufactures solar panels, batteries, and other energy collection and storage products.

Explore our favorite visualization of the immense scale of space, from an astronaut to the size of the observable universe

Explore the wineries of the Napa Valley

Plan your own Napa tour with this interactive map of the hundreds of wineries, vineyards, and tasting rooms in the valley. You can sort by a variety of different factors, including whether or not the location requires reservations, types of wine available, and even dog-friendliness. Once you’ve selected your stops, the site can also optimize your route so you spend less time in the car and more time at the wineries.

Chess can be played at lightning-fast or classical speeds

Time controls shape how the game is played—from bullet matches under three minutes, to blitz games under 10, to classical contests lasting over an hour. Each format demands different skills, from rapid intuition to deep calculation.

Explore an interactive map built from more than 100,000 survey responses on where people find joy in their lives

Track the location of the Voyager probes, currently between 13 and 15 billion miles away from Earth.

Explore an interactive map of battles from the American Revolution, along with detailed summaries of each engagement

See how each of the more than two million known species relates to each other—and to common ancestors—in this zoomable tree of life.

The Russia-Ukraine conflict is the largest ground war in Europe since World War II in casualties, forces mobilized, and displacement of civilians.

Take a 3D tour of the Hajj, Islam's annual pilgrimage to Mecca, undertaken by more than 1.5 million Muslims each year.

This site reaches millions of visitors who are tired of AI chatbots and seeking human connection. Pretend to be an AI chatbot and ask questions, provide answers, and draw for people in real time.

See the 25 of the best photos of auroras from around the world.

Volcanic activity may have triggered the Black Death by spewing gases that led to crop failures in Europe, thus forcing the import of grain ships with plague-infested fleas.

See how Ebola tore through Guinea, Sierra Leone, and Liberia in 2014-2016.

See a 3D reconstruction of Tenochtitlan, the Aztec capital that was home to an estimated population of 200,000 to 400,000.

Poison ivy was sent to Europe in the 1600s as an exotic, ornamental oddity, where it was purposefully grown in the English royal gardens at Kew, the Faculty of Medicine in Paris, and a few other locations.

For centuries, it was common to sleep in two shifts: a few hours at the beginning of the night, and a longer period beginning around midnight

In 1984, Operation Smash Hit intentionally crashed a 239-ton train into a nuclear waste canister at 100 miles per hour to prove the canister's safety, which remained completely intact and lost just 0.29 of its 100 pounds of pressure.

See photos of Meteora, a mountainous site in central Greece, home to 14th-century monasteries perched atop soaring outcroppings.

While the first exchange-traded fund (a 'basket' of different assets that can be bought and sold on a stock exchange) in the US only launched in 1993, the global ETF market has grown to more than $10T in the short time since.

Some renewable energy sources may weaken the resiliency of electric grids by removing outage buffers provided by coal- and natural gas-fired plants, which provide the system with more time to find a new power source if a plant goes down.

Alzheimer's can lead to brain shrinkage, with an average of around 2% of volume reduction per year

Clever Hans was a 1900s horse that was believed to be able to solve math equations, tell time, and read and comprehend German, until a psychology student discovered how he got his answers.

In preparation for this weekend's Eurovision finale, which is something like the World Cup of pop music, here's a young Céline Dion performing (for Switzerland?) at the 1988 competition.

The price of gas is a composite made up of several different factors, with the federal gas tax making up less than 20% of what drivers pay at the pump.

Doctors differentiate between a phobia and fear by asking patients whether their fear interferes with their day-to-day activities.