Cathedral carved out of salt, located a mile below the Earth's surface.

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

It's just another skyscraper, but it's shaped like '90s cell phone.

How a lunch counter in Chile became a shrine to the 42nd president of the United States

Pablo Neruda's custom-built lover's nest was made to remind him of the sea and named after his mistress' hair.

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

Designed as a reminder of one of the darkest moments in Austrian history.

A patriotic medieval knight in driven-nail armor raised money for widows and orphans of WWI.

On a winding Vienna side street, one museum has turned their windows into a monument to history’s peace-minded heroes.

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

Museum devoted to the artificial language of Esperanto.

The solemn exterior conceals an opulent interior of this 17th century church.

An exquisite Baroque church in Vienna's old town.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

A silly medieval mural preserved on the side of a Viennese house.

Legends surround an ancient tree trunk riddled with nails for good luck.

Baroque celebration of the end of the Great Plague of Vienna.

Handsomely crafted representations of our round planet.

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

A diminutive statue that was inspired by the sculptor's own daughter.

This sculpture honors the man who was known as the "Righteous Among the Nations."

The metal leaves on this tree are engraved with the names of Holocaust victims.

This building has survived for more than a century and remains virtually untouched.