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

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

The highest point in New Jersey is marked by a massive, if simply named, obelisk.

The highest point in Maryland is only accessible by hiking through another state.

Near-constant high winds deform the trees on Spruce Knob, the highest point in West Virginia.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

Exact replica of the ancient monument, but much, much lighter.

This campus chapel is Robert E. Lee's final resting place and a topic of debate about the legacy of the Civil War.

The hide of Stonewall Jackson's equine sidekick is on display not far from where the ashes of his bones are buried.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

The end of the 4 Line is also the end of the line for 300,000 souls in one of NYC's most illustrious cemeteries.

Once America's longest-manned military fort, now an abandoned hulk.

Where the embers of the Big Bang were first detected.

Current docking place of the SS United States, the fastest transatlantic ocean liner.

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

This Delaware River bridge is emblazoned with a catty slogan from a more prosperous time.

One of New Jersey's oldest surviving buildings still bears the mark of our former British overlords.

The first life claimed by this record-breaking peak wasn't lost to exposure or a fall but rather lightning.

You might know it as the Overlook Hotel, but the inside is not going to be familiar.

Despite a legend that says this highest peak in Oregon was climbed in high heels scores of people have died on its slopes.

The highest point in Texas is capped by a big silver pyramid.

Roaming bison and a spectacular view at the highest point in Nebraska.

Even in death, he's still your huckleberry.

At the tallest peak in Colorado, an electrifying mix of thin air, lightning, and rivalry.