In the summer months, the Eiffel Tower grows a few millimeters and leans slightly to one side because sunlight warms the metal, causing it to expand.

Explore the world's most famous leaning towers and structures

Pisa gets all the fame, but the quirk of a tilt adds precarious charm to dozens of famous buildings around the world. There are Pisa replicas, but also old castle towers, crooked houses and tilted churches and mosques.

View a gallery of whimsical transmission tower designs from around the world

Despite their importance to the functioning of the electric grid, these structures are often considered aesthetically unpleasant. To remedy this, some have been transformed into art installations featuring stained glass and colorful lighting, or built with whimsical designs, such as clown faces or giant bodies.

Minnelli is the goddaughter of Kay Thompson, the author of the 'Eloise' books

Many people speculate that Eloise, the little girl living at the Plaza Hotel in New York City in Thompson's popular series, is Minnelli. The actress, however, denies the claim. Still, people continue to theorize that Minnelli likely influenced the privileged, precocious character's traits.

'I love quotations because it is a joy to find thoughts one might have, beautifully expressed with much authority by someone recognized wiser than oneself.'

- Actress and singer Marlene Dietrich (1901-1992)

Why Water Towers Are Built This Way

An architect ranks the best bridges in the world

Architext Ezra Groskin builds bridges and argues that the best bridges do more than allow traffic. They should, he believes, encourage human interaction and lingering to ultimately become a destination of their own. Explore ten stunning designs that connect communities, from New York to Switzerland.

Americans touring the Louvre were inspired to create their own grand museums

The one-time royal residence was first transformed into a public museum in 1793 amid the French Revolution. Americans visiting in the early 1800s were both turned off by the aristocratic grandeur and compelled by the open access to the public. James Fenimore Cooper, the author of "The Last of the Mohicans," apparently came and measured the length of galleries.

Modern Champagne owes much of its existence to one woman: Widow Clicquot

Barbe-Nicole Ponsardin, better known as the Widow Clicquot, might not have actually invented Champagne, but her innovative approach to winemaking yielded many techniques still used today. Taking over her husband’s failing business after his death, the Widow Clicquot combined business savvy and innovative thinking to make the process easier, more efficient, and, most important, more profitable.

'Getting old is like climbing a mountain; you get a little out of breath, but the view is much better!'

- Actress Ingrid Bergman (1915-1982)

'Coral Castle,' Florida's self-built monument to a lost valentine

Latvian Ed Leedskalnin moved to the US shortly after his teenage fiancée ditched him. He quickly began work building a romantic tribute to this tragic episode via massive oolitic limestone. Working mostly at night, the Latvian cultivated an air of mystique as bystanders grew curious over his methods. Today, the castle stands as a bittersweet monument to unrequited love.

'No army can withstand the strength of an idea whose time has come.'

-Author Victor Hugo (1802-1885)

Leaning Italian tower could fall after nine centuries

Italian officials have secured the area around one of two 12th Century towers in Bologna, fearing its leaning could lead to collapse. Could it fall? Read up on the city's efforts to secure it here.

'Others have seen what is and asked why. I have seen what could be and asked why not.'

- Pablo Picasso

'Her own thoughts and reflections were habitually her best companions.'

- Legendary author Jane Austen (1775 -1817)

'Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world.'

- Albert Einstein

See a collection of mind-bending architecture around the world, including a teapot gas station, a duck home, and a picnic basket building.

'Wanderer Above the Sea of Fog' is an iconic romantic artwork

Caspar David Friedrich’s painting portrays man’s fascination with the natural world and emphasizes his smallness in the midst of its grandeur, epitomizing Edmund Burke's concept of "the sublime."

'Always be a first-rate version of yourself, instead of a second-rate version of somebody else.'

- Judy Garland

Delacroix's painting 'Liberty Leading the People' is one of romanticism's most recognizable works, vividly depicting a scene from the French Revolution of 1830, just a few months after it began.

Fallingwater is one of the world’s most famous houses

Fallingwater, a country house set atop a waterfall, is arguably Frank Lloyd Wright’s most celebrated work. Legend has it that the initial drawings of the house were hurriedly sketched in just three hours after Wright’s client surprised him with a phone call and announced he wanted to see the plan’s progress.

The spiralling structure of the Guggenheim Museum in New York is itself a work of art

The Solomon R. Guggenheim Museum is a UNESCO World Heritage Site in Manhattan's Upper East Side. The contemporary art museum, known for its unique spiral structure, was Frank Lloyd Wright’s final work.

'Many of life's failures are people who did not realize how close they were to success when they gave up.'

- Inventor Thomas Edison (1847 - 1931)

Nikola Tesla's original laboratory was recognized as a historical site in 2018

Beginning in 1901, the Wardenclyffe Tower was built on Long Island, New York to transmit electrical power through Earth's atmosphere. The project was abandoned before becoming operational due to limited funding, and was demolished for scrap in 1917 to help pay off Tesla's debts.

'Success has brought me world idolization and millions of pounds. But it's prevented me from having the one thing we all need: A loving, ongoing relationship.'

- Queen frontman Freddie Mercury (1946-1991)

A quote by Lauren Bacall

"Imagination is the highest kite one can fly."

The United Nations recognized eight Frank Lloyd Wright works as UNESCO World Heritage Sites.

'How wonderful it is that nobody need wait a single moment before starting to improve the world.' - Anne Frank

'When you're climbing Mount Everest, nothing is easy. You just take one step at a time, never look back and always keep your eyes glued to the top.'

- Author Jacqueline Susann (1918-1974)

Engineering tall structures requires managing wind, earthquakes, and other destabilizing factors

Reinforced concrete, energy dampers, braced frames, flexible structures, and aerodynamic decks were among the methods implemented when building structures such as the Shanghai Tower, the Texas Super Skyscraper, and the South Rangitīkei Viaduct.

1928: A quote from Amelia Earhart

"Ours is the commencement of a flying age, and I am happy to have popped into existence at a period so interesting."

Picasso’s legacy is often intertwined with his personal relationships

Family revelations and quotes show the legendary artist as both tender and cruel, and his fame and romantic advances sometimes had disastrous effects on those around him.

How the Golden Gate Bridge was constructed

San Francisco's Golden Gate Bridge is one of America's most iconic structures and is considered to be an engineering marvel. Built in 1930's, before the advent of modern construction technology, the structure was considered impossible by contemporary standards.

A quote by Howard Hughes

"Do the impossible, because almost everyone has told me my ideas are merely fantasies."

Frank Lloyd Wright was known for his uncompromising personality and visionary architecture

Written the year of his death, this article reflects on Wright’s notorious arrogance and difficult personality that kept him at odds with his contemporaries and the architectural establishment of the time. However, his boldness was an essential trait that helped define his legacy.

'You can't be that kid standing at the top of the waterslide, overthinking it. You have to go down the chute.'

- Actress and comedian Tina Fey (1970-present)

Before Alex Honnold completed his free solo climb of Taipei 101, 'French Spider-Man' scaled the building

Alain Robert completed his climb of the massive skyscraper in 2004, 22 years before Honnold. The crucial difference, though, was that Robert used safety ropes for his ascent. Honnold, on the other hand, completed it "free solo," meaning he climbed the building without any equipment beyond some shoes and a pouch of chalk for his hands.