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

"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

Experience a charming 1930s version of "infotainment."

Established in 1853, this crumbling cemetery sits forgotten on the corner of Church and Chapel in Gold Country.

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

Holy Grotto of Montserrat Monastery holds one of Europe's mysterious black Madonnas.

A rare view of a preserved Victorian science museum.

An awe-inspiring mosque in Morocco with one of the tallest minarets in the world.

Morocco's largest Jewish cemetery.

Bordered by forest on three sides and the ocean on the other, the Great Dune of Pilat is the highest sand dune in Europe.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

An abandoned stretch of highway, deteriorating next to the operational one.

This strange geological landscape erupts with sudden bursts of water.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

Temporary Burning Man sculpture made of two 18-wheelers.

"Only the devil could play golf here."

The rocks in this arid basin leave trails of movement behind them.

Smooth basaltic rocks tell a tale of ancient glacial waterfalls.

Berkeley Springs State Park boasts the nation's only monument commemorating presidential bathing.

Khmer Rouge's high security prison.

Dedicated to the art of hunting, with juxtapositions of contemporary art.