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

This antique shop offers affordable 15th-century Vietnamese ceramics salvaged from a local shipwreck.

One of Vietnam's most iconic landmarks was built by Japanese traders and is now in danger of sinking.

A small museum dedicated to Vietnam’s lesser-known Iron Age culture.

Located off a bustling strip, a silent teahouse employs workers with hearing- or speech-related disabilities.

This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

This historic Amsterdam bar used to accept sailor's monkeys as payment.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

A floating cat sanctuary on an Amsterdam canal.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

The world's only museum devoted to the wonders of fluorescence.

A strange rock formation with numerous legends trying to explain it.

This 13th century Orthodox monastery is built right into the Moldovan cliffside.

At less than four inches in height, this iconic fictional character is the smallest public statue in all of Moldova.

A forgotten remnant of the Soviet Union, Transnistria is an unrecognized country hidden behind a heavily militarized border between Moldova and Ukraine.

A mysterious ancient elephant said to possess magic powers is now the symbol of a Sicilian city.

Where Aleister Crowley taught magick in "La Chambre Des Cauchemars," his "Chamber of Nightmares."

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

Every Easter, a small Sicilian town builds a stunning cathedral out of bread.

Abandoned village in Sicily built during the agricultural reforms of Mussolini.

Check out the underground party scene at the "Burning Man of Brooklyn."

A hyper-luxurious, 12,000- square foot home might be buried beneath Queens, still waiting to protect you from nuclear missiles.

The oldest living tree in Manhattan comes shrouded in sinister legend.

You can still ride this 100-year-old work of art in Brooklyn's largest public park.