A crumbling staircase in upper Manhattan is all that remains of one of the most important sites in sports history.

The oldest house in Manhattan is now a museum that remembers the home's sordid history of scandals, vice-presidents, and ghosts.

The studio of influential composer Charles Ives is perfectly reconstructed, hidden in the back of the American Academy of Arts and Letters.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

One of the last Jazz Age "Wonder Theaters" in New York City.

The phone booths of New York City have all but disappeared, but their remains were once found in this "graveyard," sadly now removed as well.

This small, hidden cove is home to abandoned boats.

Brooklyn's Barkaloo Cemetery is the resting place of a scant two bodies.

The pioneering photographer's prints are immortalized inside her childhood home.

At the United Kingdom's only residential library you can sleep among the books.

Britain's only artificial surfing lake is nestled in the beautiful mountains of Wales.

A miniature Italianate fantasy village on the coast of Wales and the set of ITC classic "The Prisoner."

One of the world's oldest trees comes with a Welsh legend intertwining it with a spirit prophesying death.

The longest and tallest aqueduct in Britain can actually be sailed across.

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

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

A tiny village in Wales claims the name of a noble medieval hound slain for a crime he didn't commit.

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

This Welsh hotel is the spiritual home of the British 1953 Everest expedition, the first successful ascent of Mount Everest.

A clear blue swimming hole with hidden caves, still unexplored.

In a largely deserted ghost town, a little brick building recalls its history as a gold rush hub and haven for outlaws.

More than 21,000 images fill this overlooked gem of a prehistoric site.

Eat like pre-Columbian Native Americans in this New Mexico restaurant within the Indian Pueblo Cultural Center.

The official atomic museum of the United States explores the explosive and productive history of a much maligned energy source.