The handsome statue is a tribute to the post riders who traversed 52 miles of tough Arizona terrain.

Guns that have been defending San Francisco since 1904.

One of few lasting examples of the brief octagon craze that developed into folly.

Quite simply the largest tree in the world (by volume).

These millipedes glow not out of attraction, but as a not-too-subtle warning.

Four hundred granite steps were built into this massive rock by the National Park Service.

Once a year, at exactly 11:11 a.m., this monument comes to life.

Open since 1938, this diner has kept its fountain, malt machine, and all the gum that greasers left beneath its counter.

The world's smallest park was dedicated in 1948 as the only colony for leprechauns west of Ireland.

This spot in St. Louis, marked with a simple sign, has seen more pro baseball than just about anywhere else in the world.

One of few surviving standpipe water towers in the U.S.

This titanic oil company sign is a reminder of the Americana boom of the 1970s and also its commoditization.

A creepy sculpture of a decapitated head invites viewers to see St. Louis through its empty eyes.

Speak to a companion on the other side of the room loud and clear through this architectural anomaly.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

“Live hard, ride fast, eat pizza” at this joint filled with Evel Knievel memorabilia.

A kitschy, creepy St. Louis mainstay.

This is not your typical jungle gym.

These banned cigarette vending machines now sell little pieces of pocket-sized art.

Fans of vintage Vegas, kitsch, and toy pony-based gambling now flock to a casino called The D.

The Jewish section of the famous Boothill Graveyard was abandoned for nearly 100 years.

America's only nuclear missile silo open to the public.

After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.