An innovative local park built from an abandoned sewage treatment plant.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

This sidewalk tribute honors Colorado's great culinary creation.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

Oldest unrestored plantation house in America that is open to the public.

Two insane asylum bodies embalmed by an amateur.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

This rural community has attracted both scientists and techno-refugees due to its federally-mandated lack of technology.

America's post-nuclear-attack chambers of Congress.

A painted tribute to an ancient Egyptian king lurks along a stretch of Scottish shore.

An abandoned 1920s school with a mysterious history.

Take a steam-powered ride straight out of the past on this Appalachian rail line.

Iceland's largest geothermal mud pool is a little bit haunted and a little bit dangerous.

A nun spent 16 years painting the stunning Celtic mural that covers the interior of this WWI memorial.

Every September, international competitors flock to a tiny Scottish island's flooded quarries.

Legend says this cave housed a 16th-century cannibal and his family of 48.

Built during the Scottish boom in the oil industry, the village was never inhabited.

This single room has survived the centuries with almost no deterioration.

This floating garden in the sky is straight out of a fairy tale, but the real thing is nothing short of magical.

A moody and picturesque riverside ruin overgrown with vegetation.