The oldest Buddhist monastery in Mongolia has survived centuries of invasions, political shifts, and religious purges.

Does this strange mural depict witches battling beneath a penis tree?

35,000 grape hyacinths flow like water down a garden hill.

An enigmatic modern marker left next to a historic Roman site.

The largest piece of no man's land left on Earth.

Be(w)ar(e) the moat around this historic Czech castle.

The "Greatest Sewer" of ancient Rome is one of the oldest sewer systems in the world, and is still in use.

A mysterious monument where a woman who records say never existed was burnt alive for being a witch.

A Parisian boutique devoted to la Sape, the elegant Congolese fashion subculture rooted in European colonization.

This mysterious petroglyph evokes the ancient swastika symbol but was later vandalized with the more troublesome Nazi one.

This ancient stone necropolis is in danger of disappearing.

Gladiators battle and chariots race daily in the ruins of a once-great Roman city.

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

The church's remarkable frescoes incorporate Finnish artist Hugh Simberg's trademark themes of death and the supernatural.

The 10-foot-wide Long Beach home was built on a dare.

During the rainy season, this temple is almost entirely submerged, accessible only by boat.

These colorful sawdust illustrations are trampled into non-existence only moments after they are finished.

Since the 1700s, this old barrel has acted as a post box that relies on the kindness of travelers.

The largest known medieval map of the world.

Martin Bricelj Baraga's monolithic sculpture measures the blueness of the sky, and changes color to match it.

Two plaques commemorate the site of Shakespeare's first theatre.

The rose garden in Regent's Park where Pongo and Perdita met for the first time in Disney's "101 Dalmatians."

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

A climbing route in the mountains of Italy’s Dolomites, built for soldiers during World War I.