This unique library spans a mighty river.

Offering an enjoyable alternative to the standard hellacious post office trip.

If there's another drive-through golf-cart bar in a bat-filled cave on top of a mountain, we don't know about it.

The wartime prison now features haunting sculpted reenactments of the atrocities that took place there.

Walk through a clothing store, across a courtyard, and up several flights of stairs for delicious coffee with a side of beautiful views.

This seaworthy collection was sparked by one man's passion for sailing.

One man's homage to the orange as realized through a long-term folk art labor of love.

A 90-year-old underground water reservoir offers a more industrial kind of tranquility.

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

This abandoned train tunnel has been the subject of countless ghost stories for years.

This stone amphitheater was once part of Nazi Germany's plan to promote propaganda.

A vast collection of rare, historical, and vintage supercomputers.

Abandoned for over 20 years, this art deco seaside swimming pool is a magnificent waste.

This old train trestle and collapsed tunnel once allowed the railroad to negotiate the steep slopes of the Colorado Rockies.

These "anatomical machines" are only one of the many strange items in this Italian crypt.

This Neapolitan exhibition hall grants weird and wonderful insight into the intricacies of human biology.

This tall and trim architectural oddity is one of the skinniest buildings in San Francisco.

These former theme park figures have a new lease on life outside a water plant-turned-restaurant.

Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.

The haunting remains of a failed housing development can still be found behind the big box stores that were to anchor them.

An abandoned 19th-century hospital now swirling in ghost stories.

The rusted remains of an ill-fated freighter lie just off the coast of South Manitou Island in Lake Michigan.

The awe-inspiring ship from the golden era of cruising has an incomparable history and a reputation as one of the world’s most haunted places.

The evocative ruins of a 1,000-year-old hill fort lie within a popular tiger reserve.