A hidden tunnel leads to an abandoned slate quarry that's now a secret swimming spot guarded by cliffs.

Though its branches are painted bright colors by generations of locals, the tree is said to be a haunted portal to hell.

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

This sun-scorched lakebed contains samples of half the natural elements known to humankind.

Once a menacing challenge for trailblazers, this trail is now the most scenic drive in Utah.

The largest radio telescope in the world searches for extraterrestrial life from the remote limestone peaks of southern China.

Giant stone letters dedicated to the founder of Armenia's alphabet.

This half-finished "city of toys" was almost Italy's own Las Vegas.

The abandoned "Ghost Mansion" was left to decay in the mountains of Northern Italy.

The luxurious circular mansion built for a Communist leader now lies abandoned.

Stripes of flowers bloom each spring in a 50 acre rainbow of color.

An abandoned munitions factory with a shot tower continues to wage war on the surrounding environment.

This chest hospital with a dark, haunted past serves as a fitting set for horror films and a paradise for ghost hunters.

A forgotten and crumbling Yugoslav monument to the victims of fascism.

The now-abandoned Fascist summer colony served a dark purpose during World War II.

This symbol of Yugoslav liberation decorated with 620 carved heads of mythical creatures is now a forlorn relic of another time.

An abandoned monument remembering the "Pančevo Holocaust" now stands as a shadow of its former self.

Thriving meadows span a rooftop in one of Brooklyn's most heavily industrialized neighborhoods.

Known for the tunnel that leads visitors to the water.

The most southerly spot on New Zealand's South Island is home to surreally shaped, permanently mangled trees.

The largest open-air contemporary art center in Latin America is a unique experience in the Atlantic Forest.

During its heyday, the massive estate boasted its own railroad station and post office.

A beautiful waterway tucked in the corner of a power plant.

A black and white painted wall creates an optical illusion in the California desert.