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

European castle ruins in an American state park are actually the product of death and grief.

An amazing collection of sculptures and art.

Enter the Forest of the Elves.

This large midwestern cavern features impressive rock formations and an underground waterfall.

This lovely public park has an intriguing past and unique wooden bridges made of concrete.

House built with over 60,000 glass bottles.

This freshwater spring fills with 10,000 gallons of water per minute.

Inspiring Herman Melville and Henry David Thoreau, Mount Greylock in western Massachusetts is the highest point in the state at 3,491 feet above sea level.

Locals purchased this abandoned quarry in order to make sure it continues to be overgrown.

Trash escaped from a landfill to fill beaches with all kinds of treasure.

The walkable ruins of an 19th century hotel, destroyed in a horse cremation gone wrong.

A collection of full-size movie monsters opened to the public.

An eccentric inventor's castle home with its own indoor weather system.

This scenic Maryland park was the site of one of the worst prison camps of the Civil War.

A hidden alley in urban Baltimore is a haven for graffiti artists.

This English-inspired Maryland garden is home to acres of opulent plant life including bushes shaped into an entire fox hunt.

An intricately designed junk art house with four extravagant junk art cars hidden in the suburbs.

A local farm's collection of unusual structures from a now defunct storybook amusement park.

An astounding collection of medical specimens, including bits of President Lincoln.

A strange mark in the stone fence of a cemetery fabled to have been made by the Devil himself.

The highest point in Maine is a grand gift to the state citizens that also happens to be one end of the Appalachian Trail.

Religion and personal struggle gave birth to this collection of concrete angels.

A swamp and garden tour featuring local wildlife and exotic botanical specimens from around the world.