An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

Where pardoned turkeys once spent their all-too-brief final days.

These unusual rooms on wheels are holdovers from the 1960s.

The former home of the man whose radical ideas changed the nation.

This train station inspired the name of a 1970's rock band and provided the backdrop for their album cover.

This Virginia railway overpass is said to be haunted by a serial killer in a rabbit costume.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

A daily replay of the experiment that proved the rotation of the Earth.

Yo, Adrian!

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

A bunker "with enough U.S. currency to replenish the cash supply east of the Mississippi" in the event of nuclear war now protects nitrate film.