This maze-like slot canyon is a unique gem within an already fascinating geological area.

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

A unique attraction and museum dedicated to exploring iconic roadside structures.

One of the largest-ever mental hospitals now sits abandoned, surrounded by 25,000 unmarked graves.

Come for the speed, leave in love with the desert.

An experimental, automotive replica of Stonehenge.

This Colorado hiking trail provides a small gold mine of abandoned gold mines.

An abandoned quicksilver mining town surrounded by the Big Bend parks.

A railroad tunnel that, upon its completion, was considered one of the engineering marvels of the modern world.

A recreated Stonehenge stands in a country field, complete with Easter Island moai heads standing as sentries.

This Florida sinkhole hides a rainforest-like micro-environment in its depths.

One man's extraordinary topiary garden in a small South Carolina town.

A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

Exact replica of the ancient monument, but much, much lighter.

Once connected to the outside world by a single train track, this ghost town is looked after by the National Park Service.

Native Americans built this circle of stones, which was used to predict astronomical events.

Fantastic collection celebrating the final send-off.

A mining town once rife with murderous disputes over its copious treasures now creates income as a popular spot for photo shoots.

Friction between grains of sand cause a curious "singing" sound.

A half-mile long and three stories high, this bridge over the Des Moines River Valley mimics a descent into a mine shaft.

Prison made famous by The Shawshank Redemption has been out of commission since 1990.

A multi-storied adobe complex has been inhabited for more than a thousand years.

This road in the Great Smoky Mountains was supposed to assuage a displaced community, but ended up a $52 million dead end.