The oldest continual pilgrimage site in Britain was supposedly created by a gruesome beheading.

Picturesque ruins once held off mighty armies.

The decaying ruins of Wales' first asylum for the mentally ill.

A former fisherman's hut deemed too small for habitation is now a delightful tourist draw.

The highest peak in Wales is said to be the final resting place of a giant killed by King Arthur.

These haunting ruins belong to an ancient village that once had one hell of a view.

The stately remains of Llywelyn the Great's mighty fortress.

This neolithic stone grave has been altered and restored so often its now more neo than lithic.

This Welsh village gave itself a ridiculous name in a publicity stunt a century ahead of its time.

Infamous marsh filled with toxic waste, World War II-era London rubble, and dead mobsters galore.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

The remains of the furnace and iron works that produced the massive Hudson River Chain still stand in the woods of New York.

The remains of a century-old mansion that met a fiery demise years after it was deserted.

Toxic waste disaster that founded the Superfund program.

A beautiful final resting place with some surprising residents.

The remains of a failed subway in upstate New York is now an underground graffiti bunker.

"Call for the doctor, call for the nurse... Vote!! said the lady with the alligator purse."

A room hidden behind a swinging shelf in the children's section.

A collection of the best toys ever made, The National Toy Hall of Fame is filled with kids, fun, and for some reason, a bird preserve.

Comprehensive gaming collection of over 30,000 electronic games and consoles.

The gravestone of the suffragist leader attracted extra visitors during the 2016 election.

One of the largest festivals of flowers in North America takes place, appropriately, in the Flower City.

An antique cemetery in New York, this land is home to any number of famed corpses.