This isn't your average roadway—it's actually a National Park and a transportation pioneer.

A former major munitions plant that has been converted into a sprawling art space.

This stately building in Alexandria, Virginia was built by Freemasons to honor one of their most famous members.

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

An innovative attempt to break a siege in the American Civil War still scars the earth today.

The only recreation of William Shakespeare's indoor playhouse.

At 207 feet, one of the world's longest continuous escalators.

One street divides a single town that stands in two U.S. states.

The resting place of a Civil War celebrity's amputated limb.

The so-called "Bridge of Thighs" in Palm Springs allows nudists to discreetly cross the road.

Instead of faces, these sculptures have barcodes—statements on societal dehumanization.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

One of the most elaborate displays of Jellyfish is on display at the aquarium.

The final resting place of the Hunkpapa Lakota leader Tatanka Iyotaka, commonly known by the English translation Sitting Bull.

A fitting attraction for the corn capital of the world.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

Opened in 1976, this monster-sized version of the fast-food franchise is sometimes called the Epic McD.

Once a strategically imperative naval base, portions of this Bermuda dock complex now serve cruise ships.

This cathedral's stained-glass patchwork of psychedelic colors and shapes was put in place long before the swinging 60s.

A medieval replica of King Arthur's legendary table, the Round Table hanging in Winchester Castle was decorated by Henry VIII.

One of the largest megalithic complexes in England, which local legend holds is a wedding party turned to stone by the Devil.

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.