An iconic steel and chrome diner from the 1940s left empty for nearly 20 years is in danger of being demolished.

The old Route 66 town straddling Texas and New Mexico died along with the Main Street of America.

A museum dedicated to exhibiting remarkable outsider art.

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

A hidden network of subterranean passageways lies tangled beneath Indianapolis' bustling City Market.

Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.

Giant origami sculptures tucked into desert scenery beckon passers-by to explore further.

Modest by day, illuminated majestically at sunset.

At 8,000 feet, the world's highest tea estate draws visitors for both its products and its panoramic views.

An abandoned settlement originally established by British colonialists in the Andaman archipelago.

A centuries-old fortress city lies in ruin.

Centuries-old bridges grown from tangled roots.

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

This castle was established by the 4th Duke of Montrose and is connected to the Buchanan Clan.

Once the longest bridge in Ireland, this rusting span sits abandoned and overrun by nature.

One of Ireland's most infamous prisons for rebels including men, women and children.

A tiny microvalley etched into the side of Knocknarea Mountain hides another world.

While only two of the ancient buildings at this site are actually churches this was one of the earliest Irish pilgrimage sites ever.

A rocky Irish outcropping with a history of wealth, conflict, and ruin.

The world of the ancient Celtic civilization explained through a bewitching 11 acre garden.

Morocco's Argania trees are infested with nut-hungry goats.

Don't blink or you'll miss it.

An abandoned hotel in the highlands of Bali is shrouded in stories of ghosts, curses, and corruption.

The largest self-built castle in the U.S., six decades in the making.