This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

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

A giant Troll lurks under one of Seattle's oldest bridges.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

A bizarre house filled with an astounding array of collections.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

On Japan's Tashirojima Island, cats are king.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

Dramatic river bend surrounds a natural red-rocked pedestal.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

An emerald-green grotto just a short trip from Austin.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

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

The world's only museum devoted to the wonders of fluorescence.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

These fantastically named natural pools look like something out of a Scottish myth.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

An exquisite tunnel of cascading flowers.

An enormous, inside-out glass globe built in 1935.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.