The largest land animal skull ever discovered.

This chapel on a cliff is renowned for its healing powers and was founded on the site of a supposed divine intervention.

These mythological giants take time out of their busy day guarding a Victorian market to let you know what time it is.

Popular tourist destination now stands as a memorial to Sam the koala.

This historic Melbourne bullet factory is fully encased in a massive glass and steel cone.

The highest point in Washington state is a volcano covered in glaciers.

A wall of chewing gum moonlights as collective art.

A Roman-style column in Oregon hides a spiral staircase inside.

Despite a legend that says this highest peak in Oregon was climbed in high heels scores of people have died on its slopes.

The lush coastal city of Astoria is riddled with forgotten secret sidewalks.

This charmingly homemade amusement park has been growing for 40 years.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

The fifth tallest statue in the United States is a shirtless monument to the oil worker.

These massive mitts are made of 30 tons of devotional bronze.

The future of roadside attractions is this sci-fi soda mecca that is home to a 66-foot tall neon pop bottle.

Collection of skeletal systems from the "world's leading supplier of osteological specimens."

Nature's biggest mammal swims in landlocked Oklahoma.

An immersive art experience built by local arts collaborative, Factory Obscura, in the building formerly known as The Womb, a psychedelic arts center founded by the frontman of the Flaming Lips.

An acoustic anomaly with a mysterious cause.

This outdoor gallery of graffiti-covered walls pays homage to the past, present, and possible future of street art.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

The most confusing clock in New York.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Relics given to a Manhattan church to avoid seizure by the Italian government.