It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

A blank headstone topped with a pile of pennies marks the final resting place of the infamous assassin.

The Cold War-era "underground Pentagon" is a sprawling subterranean hideaway for the Defense Department.

A diorama of the Civil War, fought by cats.

The man who first patented the Ouija board rests in peace beneath a headstone that playfully reflects that achievement.

Once part of a dam servicing an early 19th century grist mill, the tucked-way falls are a tricky-to-find urban oasis.

The slate extracted from these Pennsylvania quarries was once hailed as the finest in the world.

The first of Lancaster's "rural cemeteries."

Hellam Township is reputed to feature seven remote gates, which when passed through in the right order, open an entrance to hell.

The singer, actor, and activist lived here during his final years, and now it’s a museum dedicated to his legacy.

The pop art icon's gravesite is broadcast 24 hours a day on his museum's website.

A curious building honoring past and current members of a historic musical comedy troupe.

America's smallest national park site is the former residence of exiled Polish national hero Thaddeus Kosciuszko.

This stone tower marks a lookout point over the historic Washington Crossing, and maybe some buried treasure.

An allegedly cursed tree represents a town's reckoning with a racist past.

Bell tower juts out from a village buried under a lake.

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

Some call this eerie forest of crooked trees the "Bermuda Triangle of Romania."

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.