The former private quarters and office of Dr. Sigmund Freud now hosts a museum housing the works of the founding father of psychoanalysis.

A neo-Gothic church built to thank God for saving the Emperor of Austria from an assassination.

Beautiful Austrian natural history museum with carved ceilings and row after row of ancient taxidermy.

Named after the Goddess of Harvests, Annapurna is the deadliest member of the Eight-thousanders club.

This ancient theater was once the home of fierce gladiatorial battles.

The oldest botanical garden in the world that technically isn't the oldest.

Visit the ancient, mysterious Roman catacombs ... in the Netherlands.

Reforestation in action is the main attraction in this abandoned quarry.

This shifting North Carolina sand dune is an odd little desert surrounded by oceanic forest life.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

Giant pinnacles in the sun-scorched lands of Southern Utah have been nicknamed "white ghosts."

The ancient past meets the retro-future at these dinosaur tracks that are protected by a geodesic dome.

A once-magnificent collegiate church is falling into ruin.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

100 massive sculptures in the Hudson River Valley.

One of the U.S. Forest Service's only mansions is outfitted with a dinner table for floating food.

A winding, cliffside stretch of road overlooking the Delaware River.

Oldest existing wire suspension bridge in the United States.

A fictional town that was briefly brought to life before fading once again out of existence.

A living antique aviation museum in the historic town of Red Hook, New York.

A 19th century library favored by Edgar Allan Poe and H.P. Lovecraft, known by locals as "the Ath."

To avoid the demolition costs this abandoned drawbridge was simply left in the up position.

This enormous sports car themed amusement park is home to the world’s fastest roller coaster.

Home of the infamous Rug Man of Doha.