The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

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

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

One of many reminders of Tesla's scientific contributions overlooks the falls which inspired him.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

The highest peak in the state of Vermont has some interesting features.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

A castle built for love, and abandoned due to heartbreak.

Giant granite rocks standing end-to-end like a train of circus elephants.

The only road through the heart of Glacier National Park.

The highest point in the state of New Hampshire, and while unlikely "the worst weather in the world," it sure seems that way to hikers.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

A vertically floating hemlock controls the waves and weather at Crater Lake.

When you visit his grave, be sure to rub the Great Emancipator's nose for good luck.

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

The world's largest rotating world.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

There aren't too many operational funiculars around, but Pittsburgh has two!

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

Dr Barnes' $25 billion private collection of art and arboretum.

This replica of the Greek structure is in the heart of Nashville.

California's own medieval Italian castle, authentic down to the 300-year-old iron maiden in the dungeon.

Bizarre lunar-like landscape with thousands of large stone "hoodoos."