This Polish cave has housed a dragon, a brothel, and an enduring legend.

A safari-themed castle in the South African bush with the largest maze in the southern hemisphere.

This historic hydroelectric power plant in Japan has been preserved and is open to the public.

For over 40 years, this quaint little house has teetered on a rock in the middle of a river.

The golden Buddha statue at the Wat Muang Monastery is the tallest in Thailand, and the ninth-tallest in the world.

The prison where Hitler wrote "Mein Kampf," and 278 Nazis were later executed for war crimes.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

This Rococo church is known as the most beautiful village church in the world, and does not disappoint.

These 18th century gardens tell a rocky story of the son of Odysseus.

This little gallery is devoted to one small town's passion for a very special cheese.

A red sandstone freestanding monolith rises out of the sea in northern Scotland.

The lovely lake that was naturally dammed, then naturally destroyed, then unnaturally saved.

A rotating bridge that carries a little canal over a larger one.

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

This cluster of little wooden huts once ground local farmers’ wheat into flour during the days of the Austro-Hungarian Empire.

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

A tall karst islet popularized by 007.

This vertical pinnacle in China was the inspiration for the floating mountains in the movie “Avatar.”

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

The 1936 Summer Olympics site is a crumbling remnant of sportsmanship and a history its host country would like to forget.

Where Venice's gondolas go for a tune-up.

A subterranean shelter remains intact under a busy Paris railway station.

Travel deep inside of Europe's second largest glacier in the world's largest man-made ice cave.