This narrow canyon has been carved by the river over thousands of years into spectacular and curious forms.

Generations of rockhounds got their start at this beloved, historic mine.

This Quebec estate is home to the elaborate gardens of a self-taught horticulturist.

Crooked windswept pines give this old forest an enchanted and magical look.

Woven tree art gives this towering Australian woodland a touch of mystical whimsy.

A grove of "candelabra redwoods" deep in California's Lost Coast.

The oldest Roman lighthouse still in use.

Giant granite sculptures representing family on the northern coast of Spain.

One of the last refuges of the endangered eastern lowland gorilla.

The most biologically diverse protected area in Africa is also the most dangerous.

This enchanting natural park is a magical example of a temperate rainforest in Europe.

The largest known open fault in the United States is basically a giant natural refrigerator.

If there's another drive-through golf-cart bar in a bat-filled cave on top of a mountain, we don't know about it.

This tiny site in Iowa, part of a patchwork national wildlife refuge, is home to ancient flora and fauna.

Chilly air billows out from the entrance of an abandoned mine on a steep hillside, providing a refuge for Ice Age fauna and flora.

A series of idealized caves carved to entertain guests.

A sacred lake composed of over 300 separate pools of highly concentrated minerals.

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

Unlike many reclaimed, abandoned mines, this Canadian cave system is still just a dangerous maze.

A scenic canyon with thick forests and historic ruins.

A weird and wonderful collection of items that pique curiosity and haunt nightmares.

Monty Python fans will recognize this abandoned mine as the Cave of the Killer Rabbit of Caerbannog.

One of Indonesia's tallest, this waterfall takes a 390-foot plunge into the Lake Toba caldera.

These cascading falls resonate throughout the Bulgarian forest.