The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

One of the largest carillons in the world, this giant instrument has 67 cast-iron bells played by a keyboard.

The original vault that held the president's remains still stands, empty, not far from where he was finally buried.

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

The palatial McDonald's that inspired Wesley Willis.

Illegal drag racing two stories beneath Chicago’s streets.

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

This historic hotel invented the chocolate brownie.

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

Home to an endangered salamander, a full moon celebration, and a large spring-fed outdoor swimming pool.

A 56-foot tall statue of the god of fire looks out over Birmingham, Alabama.

An acoustic anomaly with a mysterious cause.

Sports history, made in the Arroyo Seco.

A British pub embodies the spirit of a California legend.

Pasadena glamour turned government issue.

One of Hollywood’s favorite government buildings.

Colorado Boulevard’s historic bookstore, operating since the bustling city of Pasadena was merely some orange groves and a few ostrich farms.

A Masterpiece with a Tragic History.

This university transit system is a 1970's vision of the future.

A memorial in coal country commemorates the victims of an all-too-preventable mining disaster.

America's post-nuclear-attack chambers of Congress.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

The century-old bell and clock tower at UC Berkeley is the third-tallest in the world, and has fossils.

One of the oldest producers of hand-folded fortune cookies still uses its original secret recipe.