Markers along the Underground Railroad

The southbound Underground Railroad: finding freedom in Mexico

Until recently, the southbound Underground Railroad, as some scholars call it, has been largely overlooked, mainly because it left so few traces in surviving records. Read this article to learn more about this dangerous path and its travelers.

Niagara Falls was a key Underground Railroad crossing point

In the mid-1800s, the Suspension Bridge near Niagara Falls connected the US to Canada and served as a frequent crossing location for people escaping slavery via the Underground Railroad.

A map of slavery's spread across the US

Need a visual on how prevalent slavery was in the US? Scroll through this interactive map and timeline based on census data from 1790 to 1860.

Mapping the known ports involved in the trans-Atlantic slave trade

Based on historical logs, this interactive maps shows info from various ports of departure and arrival during the height of the trans-Atlantic slave trade.

The National Parks System includes 63 parks and 400 smaller preserved sites

Want to see how close you are to one of the major preserves or lesser-known historic sites? Explore this interactive map from the National Park Service to plan your next adventure to protected, historic land.

How one biologist drew a national park's definitive map

Long before GPS, biologist John Cely mapped the swampy terrain of South Carolina's Congaree National Park by hand, and mostly from memory. The map was so accurate, it became the preferred resource for the park's rangers. This Atlas Obscura article explores how Cely acquainted himself with the park's particulars and how the map grew from an unofficial peculiarity into the park's definitive guide.

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.

View animated battle maps from every major skirmish of the war

The American Battlefield Trust's animated maps trace every major Civil War battle with moving troop lines, narration, and historical context—bringing the strategies, turning points, and human cost of the war to life.

An interactive map of 250 American places worth visiting before you die

The Smithsonian created ten categories of landmarks—from history and food to oddball Americana and architecture—to enrich your celebration of America's semiquincentennial. You can sort by region or category, see a map of each location, and learn each spot's significance in a clean, aesthetic user interface.

Explore the major archaeological sites of Egypt's 3,000-year history

With this interactive map, you can see when and where every major monument was built, from the Great Pyramid in the Nile River delta to the Greek temple of Isis near contemporary Aswan.

Abandoned racetracks can be found via Google Earth

With auto racing a favorite American pastime in the 1900s, tracks both small and large were built across the country. Some were local tracks used for small races, while others were super-speedways used by NASCAR.

Hear the story of the largest single escape attempt by enslaved people in American history

On April 15, 1848, 77 enslaved individuals in Washington, DC, boarded a ship named the Pearl in the largest single escape attempt in US history. Their capture led to riots and intensified the conflict over fugitive slave laws.

One graffiti artist turned a train tunnel into his gallery

Chris Pape, also known as Freedom, began exploring a tunnel under Manhattan's Riverside Park when he was a kid. As he grew more involved with graffiti, he turned its walls into a massive art project, one that reflected both the history of graffiti and the people who made the tunnel their home.

Essential pipes, sewers, and cables lie buried beneath New York City

The Department of Design and Construction offers a tour of its work sites, explaining the complex systems that exist underground. Gas, electrical, telecom pipes, and many others, sprawl out underneath the entire city, with dozens of maps that help workers know where they're placed. This layout is unusual compared to the rest of the country, where wires are often present and visible above ground.

Listen to firsthand accounts of how Black Americans fought to end slavery and shape Reconstruction

This podcast explores the actions of Black Americans who fought for freedom before, during, and after the Civil War—highlighting their key role in abolition and the Reconstruction era.

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.

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

The history behind the country's first Black-owned bookstore

In 1834, the first Black-owned book store was opened in New York City by abolitionist David Ruggles. Ruggles founded an antislavery newspaper and was an organizer for what eventually became the Underground Railroad. His bookstore was dedicated to abolitionist literature but was also a meeting place and lending library for Black people, including those who had escaped slavery.

Public transit has been a front line of civil rights battles for over a century

Public transit was among the most contested terrain in the fight for racial equality in America, because it was where Black Americans and white Americans were unavoidably forced to share public space.

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.

The hidden hallway behind Mount Rushmore and why it’s unfinished

Mount Rushmore was designed to be more than a massive monument to US presidents, and its ambitious plans were part of the reason why. This fascinating video explores its backstory, creation, and the hidden tunnel behind President Lincoln's head.

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

Explore a map of Prince's Minneapolis

Prince might be the most famous and influential musician from a city brimming with them. This interactive map from Prince's estate lets you explore the city's locales that shaped him, from early residences to concert halls and recording studios.

Native voices share their histories along the Lewis and Clark National Historic Trail

Tribal historians recount their peoples' histories and perspectives on the Lewis and Clark expedition, offering an Indigenous narrative of the lands, encounters, and legacies that shaped the journey.

Tracking Georgia O’Keeffe paintings across America

Explore different significant locations where the painter’s works have lived, including the White House, from 1997 to 2004. Pick a nearby museum to witness the masterpieces up close.

Mapping NATO's 32 countries across North America and Europe

See an updated map with the option to learn more about each country's membership and role in the alliance. The map shows the borders of its member countries with extra filters capable of locating its many civilian structures, nonmember partners, positions of missile sites, and more.

The NAACP encouraged and accommodated the early Harlem Renaissance

The National Association for the Advancement of Colored People, a civil rights organization better known as the NAACP, recognized the disenchantment Black soldiers who served in World War I experienced when returning home to a segregated country and began advancing, and, in many ways, funding a "New Negro Movement," which would lead to the Harlem Renaissance.

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

Abraham Lincoln was almost assassinated weeks before his inauguration as he traveled from Illinois to DC through Baltimore in 1861; it took two independent claims for Lincoln to be convinced the threat was real

'Grand Canyon of the Yellowstone,' a work by American painter Thomas Moran, inspired Congress to establish Yellowstone National Park.

The story of Dollree Mapp, whose legal challenge over her 1957 conviction for possessing "obscene material" led to a major strengthening of the Fourth Amendment

Power lines are dotted with large, brightly colored balls to improve the visibility of these thin wires to helicopters and small planes and help prevent potential crashes.

Hear about the 250-year history of the United States Postal Service, complete with some of its strangest deliveries, important innovations, and the figures that made it an American institution.

When you complete a CAPTCHA on a website to prove you are human, you may be unknowingly training algorithms for self-driving cars, whose systems require training data to help identify crosswalks, bicycles, and other outdoor objects.

The American cockroach is actually from Africa, an apparent hitchhiker aboard ships carrying enslaved people, with evidence suggesting the bug may have arrived in the New World as early as the 1600s.

In 1963, a basement renovation in Turkey revealed a passageway to a hidden, multilevel underground city that once housed as many as 20,000 people

The Great Salt Lake's distinct dual coloration results from high-salinity organisms that only live in the northern portion and produce a purple protein.

Explore the history, structure, and species of Australia's Great Barrier Reef with this interactive journey narrated by Sir David Attenborough.

A 2019 Facebook event called on attendees to "Storm Area 51, They Can't Stop All of Us," resulting in countless memes, the creation of a music festival, and eventually the arrests of those who did try to approach the area.

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 2009, the nation was gripped by the story of a missing young boy who was believed to be floating over Colorado in a homemade balloon, until it was revealed that he was at home the whole time.

This poison ivy knowledge quiz—accompanied by photos of the plant's varied forms—may help you identify this common rash-inducing growth.

Louisiana's 'Cancer Alley' is infamous for having some of the highest industrial pollution, toxic air emissions, and cancer risks in the US.

Explore what it's like inside a patient isolation unit, used in situations such as treating a patient or suspected patient with Ebola.

Some coin denominations have ridges etched on their sides, partly to prevent counterfeiting, in a practice called 'reeding.'

The American Society of Civil Engineers' infrastructure report card gave the US a C in 2025, its highest grade since the project launched in 1998.

See how Budweiser's famous Clydesdales spend their days at Warm Springs Ranch, where roughly 70 to 80 of the beer brand's giant horses can be found at any given time.

Prince's sexually explicit 1984 track 'Darling Nikki' attracted the ire of the Parents Music Resource Center, an advocacy group that inspired the Parental Advisory sticker, even though the song ends with a Christian message.

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.

Netflix profits when you're not watching, and its movies are designed that way—read a detail-rich critical essay exposing lesser-known Netflix takes