European castle ruins in an American state park are actually the product of death and grief.

Less a museum than a bizarre fantasy world created by artists and engineers.

The remains of an early 1900s dude ranch that operated until the 1970s.

This natural marble cave is one of only five national monuments in Oregon.

Erosion and time have created a naturally-formed water park.

An unexpected but incredible collection of wildlife dioramas spanning rainforests, swamps, forests, and plains.

A 35-foot-tall fork stuck in the ground outside an office building in Missouri.

The show pony of cave systems, Fantastic Caverns manages to live up to its name.

Once an ambitious nature spa, these forest ruins now provide a serene monument to failure.

This oasis-like spring in the Sonoran Desert is home to unique, endangered species.