A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

There’s a hidden military meme engraved on the World War II Memorial.

It was once the base for a series of domestic terror attacks.

Home to items never before seen by the public.

World's first "penitentiary," meant to be humane, drove men insane.

One part local history, 99 parts gruesome haunted house.

An Irish Memorial commemorating those who perished due to potato blight.

The last of Philadelphia's wood-paved streets is now a landmark of terrible engineering.

The taxidermied remains of Charles Dickens' pet raven, which helped inspire one of Edgar Allan Poe's most famous poems.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

World War II bunker still standing on the New Jersey beach.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

A spiritual vortex among the red rocks in Sedona.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

Go inside to really appreciate this 500-year-old technological masterpiece.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

The Cadillac Ranch for monster truck aficionados.

Scenic mount trashmore, Virginia Beach's most curious waterfront still has a couple of secrets.

At 207 feet, one of the world's longest continuous escalators.

This hospital fell into ruins after failing to act as the advocate for the mentally ill it was designed to be.

This ominously named New Jersey street seems to be attracting over-the-top legends of its own making.

This disastrous New Jersey safari park saw animal attacks, escapes, and disease before being abandoned.