An Aztec snake god has taken the material form of an apartment complex.

One of the few places where you can visit a cenote and Maya ruins at the same time.

A clear blue swimming hole with hidden caves, still unexplored.

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

There's a mini version of Iguazu Falls hidden in the Balkans, and it's got a rope swing.

A long-forgotten Victorian swimming hole is still a fun spot for a dip.

Take a dip beneath the stalactites in this amazing cenote.

A perfectly circular lake is formed by the crater of an ancient underwater volcano.

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

The gathering point of an old Melbourne swimming club was site of a historic, world-record dive in 1918.

Unparalleled stargazing, one of Colombia's best observatories, and a swimming pool can all be found in the middle of this ancient tropical forest.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

This gold mine–turned–swimming hole is the perfect summer picnic spot, immersed in nature and history.

Locals use these rock pools and waterfalls for swimming and cliff diving.

A sinkhole and now a swimming hole, too, full of dazzling turquoise water.

This small museum explores Mexican history and culture through clothing.

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

A cenote filled with Colonial era artifacts whose waters cannot be accessed.

A mysterious, abandoned Chinese building in Mexico pays homage to the area's East Asian immigrants.

Through the colossal entrance to this cave you'll find limestone tubs and an underground waterfall.

The blowhole bursts spectacularly right next to the buildings in a medieval seaside town.

66,000 pieces of art, donated by one of the world's richest men.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

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