A mountaintop space observatory that is certified dark.

Four hundred granite steps were built into this massive rock by the National Park Service.

The second-largest giant sequoia in the world.

Quite simply the largest tree in the world (by volume).

A statue honoring the tragic heroine of a Spanish literary masterpiece.

A street where pouring cider is an art form.

The now-overgrown beach resort was once frequented by Yugoslav military elite.

Hollywood's oldest hotel is the site of the first Academy Awards, the birthplace of Marilyn Monroe's career, and the home of Montgomery Clift's ghost.

An increasingly eccentric apartment building, topped with winged beasties.

After starting as a whimsical tourist attraction that eventually found its way to ruin, these renovated canals offer a lush and exotic locale on the Pacific Coast.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

One incredible room in the Santa Barbara Courthouse is covered in wall-to-wall canvas murals.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

A serene memorial that honors the adventurous spirits of climbers who lost their lives in the High Tatras.

The modern birthplace of Irish freedom.

A hidden highland of peaks and pastures, largely unchanged since medieval times.

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

An ambitious developer built what was once the world's tallest fountain in a Phoenix suburb.

This 47-foot chile pepper sculpture welcomes Scoville heat unit obsessed tourists to the Big Chile Inn.

The entire history of the U.S. Space Shuttle Program is painted on an enormous roadside water tank.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

This cheery fruit farmer welcomes visitors to a classic roadside emporium.

This sculpture is intended to reset a person’s creativity.

This water tower slanted at an uncomfortable angle off the old Route 66 was an ingenious marketing ploy.