A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.

These azure waters were thought to lead to the Mayan Underworld.

Found down a long dirt road, a sacred Mexican cenote and 18th-century hacienda remain hidden.

If you can look past the nearby sewer pipes, this urban sinkhole grotto is a mini-paradise.

A small collection of iguana-infested ruins hides amid Cancún's bustling hotel zone.

This temple to the sturm and drang of Richard Wagner contains a dragon's cave and reptile zoo full of living "dragons."

A ruined castle stands atop a hill surrounded by dragon lore.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

This small corner bar is home to a rare 1930s dance organ that still plays tunes for one Euro.

This statue dedicated to the story of a Flemish boy and his dog was relatively obscure in Belgium, but a cult sensation in Japan.

This legendary giant, born from vegetables, terrorized townspeople and cheated local children in games.

This former guildhall with a bacon-like exterior is now home to a museum covering 600 years of Antwerp's musical history.

Invisible bridge parts the waters, invoking biblical images and preserving the ominous feel of an ancient moat.

Part modern art project, part traditional chapel, this see-through church is only substantial from the right angle.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

This unique rock formation is quite the local celebrity, although one day it may come crashing down.

Lava stone structures possibly dating back to the 19th century may have been a stopping point for voyagers between ancient Egypt and the Mayan Civilization.

This local emblem is the oldest and largest dragon tree in the Canary Islands.

According to the Guanches, the aboriginal people of the Canary Islands, the king of evil lives inside this volcano.

This giant middle finger statue sends an unambiguous message to Italy's bankers.

This poignant art installation raises awareness of violence against women.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

A magical and peaceful ruined Cistercian abbey in what is now southern Belgium.