Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

This lucky bronze frog was gifted to Madrid by a casino.

Commonly acknowledged as the only public monument to the Devil himself.

Monsters and miniatures are held in equal esteem at this wondrous museum.

This commercial and retail center was crafted from walled military barracks.

Temple complex that once housed the famous statue of Nike.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

An ancient octagonal weather station named for the eight Greek gods of wind.

The hallucinogenic center of the ancient world.

The world's most active stratovolcano is almost always erupting.

A Guinness World Record-holding social enterprise whose shows don't shy away from heavy themes.

Though it was originally dedicated to the Hindu god Shiva, Baphuon was converted to a Buddhist temple in the 15th century, complete with a massive hidden statue.

A quick and simple solution to Cambodia's train woes.

Take a hidden path to the mouth of the cave to watch millions of bats swarm at sunset.

A battle between nature and architecture in the Cambodian jungle.

This gem from the industrial age helps visitors and residents alike traverse hilly Stockholm.

Sweden's "good old days" painstakingly re-created in a model village.

A rare surviving Victorian greenhouse designed specifically to house giant water lilies.

It houses the remains of a 17th-century version of the Titanic.

Roughly 17 million letters to Santa have found their way to this Arctic Circle post office.

These ruins by the Dead Sea is where John the Baptist met his untimely end.

A refurbished locomotive from a bygone era in the middle of the Jordanian desert.

Just outside of Jordan's capital lies an ancient castle and intriguing caves dating back to the Copper Age.

This exceptionally well-preserved ancient marvel also houses a small museum dedicated to Jordanian folk tradition.