This simple highway curve has become a comedic pilgrimage site.

The haunting ruins of Jack London's dream house.

Stairs often replace streets on the steep slopes of this old mining town.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

A monument celebrating the idea of reaching inaccessible places.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

A wall of chewing gum moonlights as collective art.

A giant Troll lurks under one of Seattle's oldest bridges.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

It should come as no surprise that the best view of the Hollywood sign is from Batman's lair.

Saint Joseph was said to heal the deaf and blind, but it was a much smaller miracle that got him canonized.

An early 20th-century bullring converted into a modern shopping center.

The oldest giants in Catalonia are now displayed in a 14th-century Gothic church.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

Turntable anonymously received orphans, alms, and groceries.

One of the most photographed buildings in a city known for its Modernista architecture is an abandoned squat.

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

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

This semi-secret storybook hedge maze is also the oldest garden in the city.

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