America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

This candy-colored storybook village originated as a 19th-century Methodist campground.

The crown jewel of the Queens Museum is a nearly 10,000-square-foot architectural model of the city originally built for the 1964 World's Fair.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

This abandoned ironworks was once the most important military supplier in America.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

This communist country can still appreciate its fragrant past.

After the Cuban Revolution, the famous rum company had to leave their swanky headquarters behind.

His music once banned in Communist Cuba, John Lennon is now immortalized in bronze by Castro, who considers Lennon a "fellow dreamer."

Castro's communist ice cream mothership has been serving five-scoop "salads" for over 50 years.

No one knows the meaning behind this giant sculpture of a nude woman with a fork riding a rooster in Havana.

Once a favorite playground for the world's most illustrious guests, Hotel Nacional's secret weapons and bunkers reveal a more menacing side to its golden history.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

In terms of history and architecture, this is one of the most remarkable cemeteries in the world.

This iconic pavilion in Barquisimeto has a roof made from 16 “petals” that open and close depending on the weather.

This unique depiction of the Virgin Mary may be the tallest kinetic art sculpture in the world.

Pivotal home of Nobel Prize winner Pablo Neruda.

What was once a unique system of urban elevators is turning into a mechanical ruin.

Built for the 1962 World Cup, this fully functioning botanical clock is still ticking.