When zealous marijuana enthusiasts kept stealing the "Mile 420" highway marker, the State of Colorado got creative.

The high point on the 16th president's eponymous roadway is marked by a massive version of his head.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

Supposedly Satanic numbers adorn this preserved submarine sail.

This town is home to the world’s largest arch constructed entirely of elk antlers.

Population: 1.

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

Despite repeated attempts to make it work, this former mining town is now nothing but dust and memories.

The deserted railroad town had a last gasp as a ghost town attraction before being abandoned for good.

A small wooden boat once owned by legendary actor Errol Flynn sits inside this Oklahoma gas station.

Tracks near this Texas nature site were once thought to support the Creationist belief that man and dino coexisted.

This soda factory is one of the last in America to use real cane sugar despite the protestations of Dr Pepper.

Housed in a century-old building, this museum's dedicated not just to soft drinks, but to the free enterprise system.

Official museum, hall of fame, and repository of the Texas Rangers.

Some of the best pastries in "the Czech heritage capital of Texas" come from a gas station off I-35.

Legend has it the commander of the defenders drew a fateful line in the dirt with his sword just before the final battle.

Two small markers remember the Alamo's feline protectors.

South Dakota's oldest operating brewery is housed inside a historic firehouse.

Calidum et Deliciose Succosum!

This bright yellow building is packed with sweet treats from all around the world, from chocolate-covered crickets to whoopie pies.

A small "palace" and museum made of, and devoted entirely, to salt.

From Nunavut to Tierra del Fuego, you won't find any lighthouse higher than this one.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

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