A home built with marble tombstones from the graves of 2,200 Union soldiers buried in a Virginia cemetery.

This collection of over 50 classic pinball machines awaits visitors to downtown Roanoke.

Edgar Allan Poe's old dorm is now a shrine to the author's legacy.

The flower-shaped temple in Virginia aims to transcend the boundaries of the world’s religions.

A secretive collection featuring objects that were designed specifically for U.S. intelligence operations.

This maze-like slot canyon is a unique gem within an already fascinating geological area.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

Alongside this Memphis trail are several sculptures that show trail-goers how to relax.

Victorian-era Egyptomania left its mark on this Nashville landmark.

In the hometown of the Grand Ole Opry star is a larger-than-life memorial statue made entirely from chicken wire.

Follow the steps, and this roadside artwork will teach you how to dance.

The world's largest collection of porcelain "veilleuses-theiere," or night light teapots, includes four that belonged to Napoleon.

This defunct, fortress-like prison has been the setting for several movies.

The "Jade Museum" is full of thousands of intricately carved works of art made from various precious stones.

Crumbling Kennedys and a decaying Tecumseh are just some of the haunting remains of one man's cement art trail.

A restored, one-room African-American schoolhouse in the diva's hometown now preserves the legacy of its most famous student.

An engraved boulder marks the spot where Patsy Cline's life ended in a plane crash.

This large cave is a summer home to thousands of bats and has a rich history dating back to prehistoric times.

Over 20,000 sets of spice shakers reveal the surprisingly telling history of our most basic spices.

The first full-scale tunnel built in America is short but scenic.

Walk the whole Mississippi River!

Mile-long cave system near Great Smoky Mountains.

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

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.