The antique hotel still has a jail in the basement, though the cockfighting ring is long gone.

This ancient shrine has been rebuilt every 20 years since the eighth century.

This gallery of prehistoric red ochre art lines the wall of a scenic segment in Utah's San Rafael Swell.

Locals transformed this Canadian evergreen into a secret hangout with spectacular views of Vancouver's skyline.

The complex has been abandoned since the Croatian War of Independence, barring a stint as a set for 'Game of Thrones.'

Things aren't quite what they seem at this mind-bending museum.

This ruined fortress was the stronghold for a persecuted medieval leader and his infamous Assassins.

A vintage video game wonderland in downtown Reykjavik.

Exquisite wall sculptures carved in secret by an early quarryman in an obscure corner of the Paris Catacombs.

Mysterious face-like images that appeared within an Andalusian house are surrounded by legends of the paranormal.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

The huge collection of paintings of the American West is one of Denver's best-kept secrets.

Dozens of lights dangle from the branches of what may be the brightest tree in Los Angeles.

Once in disrepair, this popular Texas stop along iconic Route 66 has been restored to its past glory.

Conspiracy theories and occult legends surround this mysterious natural rock formation.

The museum calls itself the "National Museum of the Paranormal" and is full of eerie oddities.

At this Minnesota state park you can easily wade across the source of the mighty Mississippi.

A 200-year-old bar with a cheeky name claims to have served Edgar Allan Poe his final drink.

Bacteria and algae give the salty water its bubblegum hue.

The abandoned "Ghost Mansion" was left to decay in the mountains of Northern Italy.

Hidden dwellings in the cliffsides of North Togo used by local Moba tribes to evade 18th-century slave traders.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

Every hour the doors open to reenact the legend of the heroic mayor who saved his town by drinking a gallon of wine.

The final remnant of the Arkansas zinc industry is this historically protected ghost town.