The overgrown remains of an old rail bridge rise above the valley like ancient Greek ruins.

A retro walk through the history of the tube.

Unique collection containing a wide and curious range of contraceptive items.

This lovely university observatory continues to sit abandoned since its potential savior was sent to jail for fraud.

A remarkably opulent mansion with a tragic history.

This otherworldly church spire reaches up toward the heavens.

This Italianate Villa-style castle is pretty to look at, just keep off the private property.

This abandoned prison castle has become an imposing gallery of graffiti art.

This crumbling UFO is one of only a few remaining "moveable ski chalets" of its kind.

One of Frank Lloyd Wright's final works was this UFO church.

Six tiny houses built for working class people form the largest intentional cluster of Wright homes anywhere.

This abandoned, windowless concrete block is one of the strangest buildings in Tulsa.

A whimsical tower with a spiral staircase, inspired by the Space Age and the Möbius strip.

This architectural triumph is the only Frank Lloyd Wright house in Alabama.

This abandoned cemetery has a dark past of bodies buried over bodies.

An abandoned theme park with a strange and tumultuous past.

This former tuberculosis research hospital endeavored to cure the dreaded disease with fresh air and positive attitudes.

Alexander Hamilton’s creation caused quite a bit of controversy.

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

This elaborate towering structure was once famed for its revolutionary height.

This hidden gem of a garden has one of the only surviving Victorian ferneries in America.

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

In which a local geological marvel becomes a quaint roadside attraction.