Live long and prosper in Tennessee.

This funicular railway rumbles along for a mile up the nearly vertical face of Chattanooga’s Lookout Mountain.

Walk the whole Mississippi River!

This head-spinningly bizarre Depression-era art cave is wall-to-wall quartz and Jesus.

Mile-long cave system near Great Smoky Mountains.

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

Home of an evil witch famous within southern folklore.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

A glittering Thai Buddhist temple in suburban Pennsylvania.

A living maritime paradox still floats in the same lake where it was built and resurrected... or was it?

The body of St. John Neumann and his collection of hundreds of relics, on display in a Philly church.

Priceless space junk on display in front of a local Dairy Queen.

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

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

This eccentric mansion museum holds a impressive collection of rare and automatic instruments.

This park contains a number of standing stones meant to heal and inspire.

Pennsylvania's own Roswell-style UFO mystery.

This titanic java kettle is one of the many kitschy landmarks located along America's OTHER famous highway.

Pennsylvanian mass grave and possibly mass murder.

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

When the Austin Dam failed it destroyed much of Austin...and then it failed again.

Over 100 concrete munitions bunkers are all that remain of a Pennsylvanian village seized by the US government.

The house that Frank Lloyd Wright "(shook) out of his sleeve at will" at the age of 86.

Buildings that dynamite couldn't bring down were abandoned because of bathroom issues.