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

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

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

Belly up to the bar in Cowtown, don't forget to buy some boots.

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

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

The interior of the Overlook Hotel in "The Shining" was based on this Yosemite original.

This massive redwood tree has a hole in the base big enough to drive through.

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

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

In the St. Francois Mountains in the Ozarks at 1,772 feet above sea level, Taum Sauk Mountain is the highest (and possibly oldest) peak in Missouri.

The show pony of cave systems, Fantastic Caverns manages to live up to its name.

400 million-year old limestone caverns nestled in the Ozarks served as shelter and a hideout for cultures throughout North American history.

The "World's Largest Underground Business Complex," a 55,000,000-square-foot city underneath Missouri.

This recently restored timepiece has stood all around Kansas City.

A beloved, quirky little fountain featuring a large frog spitting water at a naked boy.

The first car-centric shopping plaza in the U.S. brought a little bit of Spain to downtown Kansas City.

Four, 18-foot-tall badminton shuttlecocks lie scattered about the lawn of a Kansas City museum.

Community bookshelf of 25-foot-tall book spines.

A rare chance to get up close and personal with a 13-mile ribbon of ice near downtown Juneau.

Upside-down trees serve as natural flower pots in this hanging garden of Alaska.

The arboretum whose marshy soil sucked up the dreams of housing developers.

An extravagant western hotel where every floor is the "ground floor."

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.