Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

This railroad tunnel was once the longest in Massachusetts.

A cave dug by a man directed by ghosts to find pirate treasure.

A sign marks the plane crash that caused two nuclear bombs to fall in North Carolina.

A 315-foot spire jutting out from the Blue Ridge Mountains makes for breathtaking views.

The scene of the largest surrender of Confederate troops at the end of the American Civil War.

Mysterious ancient boulder carved with petroglyphs in the mountains of Western North Carolina.

This bright yellow relic is the final survivor of a short burst of seashell-shaped petrol pumps.

Oldest synagogue in the United States.

Enjoy egg rolls and live music in a converted bank vault.

This cemetery is home to numerous granite headstones that are works of art unto themselves.

An architectural statement of artistic intent smack in the middle of Providence, Rhode Island's Colonial uniformity.

The final resting place of New England's last "vampire."

Hundreds of protractors affixed to surfaces all over the city.

A museum dedicated to the history & joys of the trail & your best chance to see hikers throwing up ice cream.

North America’s largest collection of horological devices and home to a colossal clock with a dizzying array of features.

With 3,000 bikes on display, the world's largest bicycle museum includes some famous rarities.

These disused steel furnaces are now haunting ruins that may one day be a national park.

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

This church in Pittsburgh is home to the largest collection of religious relics in North America.

Where America’s first doomsday cult awaited the end of the world.

A toxic ghost town sitting atop a massive coal fire.