A playground built by the kids that is a child's wonderland, and a helicopter parent's nightmare.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

A formerly abandoned mental institute, now back in business.

A natural gas leak provides a flickering flame beneath a waterfall.

A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.

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

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

This museum boasts the ninth-largest collection of insects in North America.

The world's largest collection of witchcraft regalia.

First a horse rendering plant, then a 19th century landfill, this beach is full of glass from thousands upon thousands of broken bottles.

Every autumn, this hillside is ablaze with red summer cypress.

Home on the Hillside, and home of the first breakfast cereal.

An abandoned castle owned and ignored by Masons carries a cursed history.

The longest hedge maze in the world.

Dynamite factory turned museum explores the history of explosives.

An enormous concrete structure built over a nuclear crater.

Superstitious? Discover the witchy side of Mexico through its largest esoteric market.

Annual convention held by the largest pyrotechnic community in the world.

A fine, large-aperture telescope available for public use.

In Washington's Yakima Valley lies a town "where dinosaurs roam."

An abandoned horticulture institute gloomily presides over rows of derelict and vine-wrought greenhouses.

The largest medical and anatomical collection in France lies hidden from the public.

A unrivaled and rather horrifying collection of wax dermatological models.