This ancient trail climbs the mountain where a Latin League cult worshipped Jupiter, its main deity.

This single-track road rewards brave drivers with stunning Scottish scenery.

The frozen bubbles that form on the icy surface of this Canadian lake contain enough methane to create a small explosion.

This medieval manuscript collection has some of the most obscure and ancient texts in the world.

The observation point offers spectacular views of the ruins of an ancient Armenian capital.

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

This Philly landmark has a giant butterfly pavilion, three floors of insect displays, and withstood a $40,000 heist.

The abandoned coal loading dock is a canvas for unsanctioned art.

Locals call this magical moss-covered walkway the "Emerald Path."

These lush botanical gardens employ the most purrfect pest control force.

Enjoy a slice while browsing the world's largest collection of pizza memorabilia.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

Mysterious rocks that ring musically when struck.

New York City's only radical feminist independent bookstore.

This one-man homegrown eatery may be the world's most exclusive restaurant with its five-year waiting list.

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

An arcade packed with a rotating collection of unique independent video games.

A six-story treehouse offers spectacular views of New York's Finger Lakes region.

Unusual books about food and drink abound in this 19th-century New York townhouse.

This small Catskills village has six independent bookstores and more bookshops than restaurants.

A field in which God and his son Jesus purportedly appeared to a young farm boy named Joseph Smith.

Obscure and obsolete publications are given new life as works of art.