Most-visited and most-photographed slot canyon in the American Southwest.

A Jenga-style cylindrical tower of books that appears to go on forever.

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

This ancient Irish tower could easily have stood in for Rapunzel's prison.

Steadily reminding Czechia of its past.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

This automated sculpture of two men peeing will spell out text messages with their micturition.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

Macabre astrological automaton clock dating to the late 1400s.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

This spooky statue sits outside a famous Prague theater.

A significant example of Czech cubist architecture—a style you won't find anywhere else in the world.

This sculpture combines the literary Alice with her real-life inspiration.

These free-roaming horses were once destined to disappear from the land.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

A mysterious pair of mice eating a piece of cheese is London's smallest public sculpture.

The Great Fire of London and the regulation of one-way streets both started in this alley.

The subtle science of a master molecular gastronomist.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

One small town in the Pacific Northwest transformed itself into a Bavarian-themed tourist destination.

This impressively large collection includes crackers shaped like Jimmy Carter, Mickey Mouse, and more.

The site of the Wellington avalanche, one of the America's worst railroad disasters.