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

View rare birds and interact with lemurs at this nonprofit run entirely by volunteers.

The crumbling structure is a rare surviving relic of the area's bygone mining industry.

The first declared National Monument in the United States.

This fairytale-inspired cottage was created by a university literature professor.

The ruins of a creative scholar's fantastical unfinished sanctuary act as his massive gravestone.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

This family mausoleum is steeped in symbolism and looks more like a fantasy location than a grave.

The railroad tunnel nicknamed the "Bloody Pit" for taking the lives of hundreds during its construction.

Life-sized sculpture of a blue whale made of hand-recycled plastic trash.

A sprawling collection of over 106,000 toys from around the world.

Long before guestbooks and hotels, frontier travelers signed their names on this rock face.

A century-old cabin off of Highway 30 touts an unusual construction material: dinosaur bones.

Summer in Scotland begins with a spectacularly wild and colorful event rooted in ancient pagan traditions.

This small museum in a 17th-century building honors three iconic Scottish writers.

On this stunning Scottish island, you can walk in the footsteps of dinosaurs.

The only fixed chain and post trail in Scotland snakes its way along the base of a towering seaside cliff.

Near the former site of numerous witch burnings, this lavish Edinburgh mainstay pays homage to Scotland's brutal history.

During this Shetland Islands celebration, hundreds of torch-carrying "guizers" lead a procession to burn a viking longboat.

The taxidermy remains of the first mammal ever cloned from an adult cell are on display in Edinburgh.

A curious collection of mechanical moving figures.

Old-fashioned knowledge and modern engineering create the world's only rotating boatlift.

At high tide this strange footbridge appears to have no purpose whatsoever.