These murals stand as reminders to the troubled history of this Northern Ireland city.

Dedicated to the history of the 1,000 nuclear missiles that once covered the Great Plains.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

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

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

An eerie, derelict amusement park in Berlin.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.

The way these carnivorous dinosaurs are posed is an homage to a classic work of paleoart.

World's first "penitentiary," meant to be humane, drove men insane.

A Looff creation in Santa Monica best described as “a California-Byzantine-Moorish-style fantasy.”

Fourteen curious and controversial white bunnies sit in a circle near Newport Beach City Hall.

A sacred lake composed of over 300 separate pools of highly concentrated minerals.

On the Oregon coast there is a natural hole that seems to be draining the sea.

Sunset-colored dunes of volcanic ash make taking a poor photo impossible.

Marta Becket's hand-painted theater in the desert.

A deserted hodgepodge of experimental structures designed by nearby university students.

Panorama exhibition hall in old silent theater with a beautiful backyard garden.

A museum marks and documents the site of the Titanic's launch.

Named after a bandit and the star of several Hollywood prehistoric landscapes, these sandstone formations are a historical part of the Los Angeles natural landscape.

This volcanic plug boasts the longest recorded history of any Scottish stronghold.

This Scottish museum is the only one in the world to focus not on one religion but all of them.

The enchanting archway is the only surviving portal into Dublin's lost medieval wall.