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

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

On the Oregon coast there is a natural hole that seems to be draining the sea.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

World's first "penitentiary," meant to be humane, drove men insane.

A terrific purveyor of natural history objects and curios.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

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

A timber wharf that contributed to Echuca becoming the largest inland port in 19th-century Australia.

The world's first cageless zoo is working to save endangered Tasmanian devils.

The evolution of a simple creek cutting its way through an ochre mountain side.

A totally unique, animatronic depiction of the Australian gunslinger's last stand.

This former psychiatric hospital was once one of the largest in Australia.

A rare chance to enter an original gold mine from the 1800s.

A cairn commemorating James Cook's second landing in Australia.

A hidden lane full of top-quality street art.

A museum in rural Queensland wrongly claims that dinosaur fossils possess evidence that the earth is only 10,000 years old.

This statue commemorates a special connection between ancient Greece and the Melbourne suburb of Brunswick.

The sullen remains of vessels abandoned in the Port Adelaide River.

On the outskirts of an opal-mining town, these baths fed by a massive underground aquifer are a natural spa.

Featuring Torres Strait Islander cuisine and Australia's first indigenous bar.

For nearly 50 years this airplane that crashed during World War II remained missing in the remote Australian backcountry.

This previously dilapidated alleyway has been transformed into one of Melbourne's finest hidden art locations.