Railways may have forged this quintet of lovely tunnels, but now they are open to hikers.

An old world fairytale-land with over 350 fairy folk figurines hidden amongst 800 year old cedars.

Prehistoric animals decorate this popular outdoor park.

A delightful park featuring homemade scale replicas of dinosaurs, tucked away in the Tennessee mountains.

A collection of colorful dinosaurs hidden in an actual rainforest.

South Korea's love of the silly photograph is on full display at this goofy collection of trompe l'oeil paintings.

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

A swing to dangle you off the very edge.

Staves, storm-calling, and of course, necropants.

A solitary tree has grown up all alone on Lake Wānaka, backdropped by the beautiful Southern Alps.

Oh, just a motel on the edge of the desert decorated with thousands of clowns conveniently located next to an abandoned graveyard.

The remains of a monument in the remote Kazakhstani desert dedicated to the only men to die in outer space, the crew of the Soyuz 11 rocket.

An archive of nearly every day of Buckminster Fuller's life.

A forensic lab dedicated to fighting crimes against wildlife.

The oldest bibliophilia club in America, with exhibitions on historic books and graphic arts.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

The latest in a series of long glass bridges suspended at terrifying heights.

This hidden stream beneath Indianapolis makes an appearance in the best-selling novel "Underground Airlines."

The thousands of shades on display — some toxic, others impossibly rare — are a library of more than just color.

Buildings from the fictional planet of Tatooine still litter the Tunisian desert.

The entire length of the border is marked by a 20-foot-wide slash through the trees.

Remnants of a storybook amusement park hidden behind a strip mall.

One of many gator theme parks, abandoned in the sugar fields of South Florida.

A tribute to Ponce de Leon's supposed quest for eternal youth.