Ha Long Bay's "Cave of Surprises" houses a popular phallic rock formation.

These crumbling towers are some of the last remnants of a centuries-old Vietnamese culture.

A desert in southeast Asia, complete with a beautiful lake covered in lotus flowers.

This striking landscape in northern Vietnam contains both geological and archaeological wonders.

Have fun at the world's first Buddhist waterslide park.

Vietnam's feral abandoned water park offers access to a post-apocalyptic funscape, now with fewer crocodiles.

This spectacular bridge supported by two gigantic hands looks like something out of a fantasy universe.

World's largest cave was only discovered in 1991, and now offers tours to the public.

This medieval Italian town is a sheer (and beautiful) cliffside defense.

The glowing blue Nymphaeum of Emperor Tiberius.

Beautiful views and Roman-style statues on the Italian coast.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

An alchemist's "magic door" stands in the middle of a Roman park.

A small island less than half a mile from Venice is a forbidden island with a dark and twisted past.

A submerged archeological park still holds the wonders of a Roman Sodom.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

A 16th-century horror show built in a lovely Italian garden.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

This fairy-tale, neo-Gothic church in the Azores is a world of magical realism.

Portugal’s highest lighthouse has one of the most impressive focal planes in the world.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

Houses are tucked between, on, and underneath giant boulders.

A daring D-Day assault by U.S. Army Rangers is commemorated atop the high cliffs of this strategic point.