The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

These banned cigarette vending machines now sell little pieces of pocket-sized art.

A giant open-air sculpture made of over 200 full-sized boats.

Temporary Burning Man sculpture made of two 18-wheelers.

Las Vegas's very own 40-foot-tall fire-spewing praying mantis.

A massive cave complex boasts some of the clearest water (and most charming bats) in the world.

One of the most spectacular canyons in the world.

A mud brick kasbah with a history of lavishness and traitorship.

God's Saharan sandbox of wrath.

A fortified city, home to a remaining population of five families

An old hill fort covered in over 100,000 crosses is a symbol of Lithuanian nationalism and beliefs.

Things aren't quite what they seem at this mind-bending museum.

Legend has it that Napoleon Bonaparte fell in love with this Gothic church.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

Singapore's landscaping project is home to 18 incredible Supertrees.

Op-art architecture designed for happiness.

Stare out over the lagoon and beyond from this 10th-century campanile on the island where the city of Venice began.

Centuries ago, red and white wine poured from the statue's breasts whenever a new Venetian ruler was elected.

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

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

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

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

This domed temple was built in a hidden cave mouth as a refuge for sinners seeking absolution.

White beach sands made of the remains of tiny, star shaped creatures.