A propulsion engine testbed that paved the way for the Space Shuttle launch sits without recognition at this rocket center.

It may look like no more than a full-scale model, but every part of this full Space Shuttle stack had a working role in aviation history.

This overlooked courtyard and museum celebrate Benjamin Franklin's life and achievements.

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

This elaborate towering structure was once famed for its revolutionary height.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.

Yo, Adrian!

The first American department store, and home to the largest operating musical instrument in the world.

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

The world’s first penitentiary, meant to be humane, drove men insane.

The world's largest military aircraft cemetery.

One of America's oldest stadiums was also the site of one of the most brutal anti-labor acts in American history.

A maze-like landscape of globular rocks surrounding two Arizona lakes.

Hikers and walkers flock to this historic volcanic butte for its scenic desert views.

Enormous photography collection housed in a study center co-founded by Ansel Adams.

Giant steel and concrete dinosaurs near Route 66 invite passerbys into a mineral shop.

Browse an impressive collection of passenger and military aircraft dating back to World War II.

This Old West hotel, the longest in continuous operation in the state of Arizona, is claimed to be haunted.

This open-pit mine is now an abandoned symbol of Bisbee's copper-mining heritage.

Out of a desire to feed hungry soldiers, a franchise-altering idea was born.

At an isolated roadside rest area stands a monument marking where famous Western star Tom Mix died in 1940.

Nothing to see here.

A colony of Mexican free-tailed bats live under the bridge and take flight at sundown all summer long.