The world is full of swimming holes, but few compare to Samoa’s idyllic To Sua ocean trench.

This geothermal hot spring hides beneath a slowly growing mineral dome.

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

Giant reed houses made in the marshes of Southern Iraq.

This Hawaiian cattle ranch acts as a museum devoted to the island cowboys that predate the wild west.

This secret gem of a toy store houses a rideable carousel populated with fantasy animals.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

A psychedelic labyrinth on the San Francisco bay.

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

An impressive collection of over 50,000 minerals including moon rock from the Apollo 17 mission.

This modern antique shop is a museum for 1980's Saturday morning cartoon culture.

A technicolor place of worship for Elevationists.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

The home of one of America's most wealthy industrialists is now a historic site that remembers a more decadent time in the country's history.

A wonderfully strange collection of 500+ stuffed frogs doing people things.

A complex, nine-layer maze on the grounds of a Venetian doge's playground.

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

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

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

The world's largest squirrel statue clutches a pecan bigger than your head.