This entire town moved to a safe location after it was devastated by an earthquake, but the remains of the original town are still around.

Cave shrine on Monte Pellegrino.

"Stairs of the Turks", a chalky white cliff eroded conveniently into stairs, allowing for easy pillaging.

Two geological phenomena in one precarious locale: a towering stone window, and a deep blue void.

This prison on the Maltese island of Gozo is almost 500 years old, and they have the graffiti to prove it.

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

This subterranean necropolis holds three floors of antler-dug grave caves.

Stone Age solar temple is aligned with the sun on each equinox and solstice.

Ancient mysterious ruts carved in the bedrock.

Burial grounds for more than 1,000 bodies deep under the modern town of Rabat.

Artifacts and memories from the Vietnam war, located in a place that experienced it first hand.

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

An extravagant monument to an extravagantly unpopular Emperor.

This Vietnamese hell cave lets visitors take a walk through a devilish underworld full of demons.

This bridge is embedded with a giant steel dragon that breathes fire from its mouth.

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

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