This impressive working clock made of 16,000 plants changes its flowers twice a year.

Home to a full cast of the largest woolly mammoth ever recovered in North America. 

Cascading outward, this waterfall creates the appearance of a flowing veil.

This remote Montana battlefield is the site of the Nez Perce Flight of 1877.

Spectacular views await visitors to this lake.

The highest point in Mississippi is a hilltop that was once used to bombard a nearby town with artillery.

The only road through the heart of Glacier National Park.

The highest point in North Carolina and the United States east of the Mississippi River, Mount Mitchell is named after argumentative explorer Elisha Mitchell.

The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

This simple badlands butte is the highest point in North Dakota and may be the only high point to charge admission.

"...I guess that was your accomplice in the wood chipper?"

Rare recess caves fill this unbelievably beautiful Ohio park.

East meets West in this Japanese-style garden featuring plants native to Maine’s Mount Desert Island.

This 1,700-pound edible sculpture is way better than your average chocolate mousse.

This candy-striped tower is the farthest east you can go in the United States.

The highest point in Louisiana, Driskill Mountain at 535 feet above sea level.

This ancient settlement contains some of the largest earthen mounds in North America.

You can climb to the summit of Black Mountain, as long as you sign the waiver.

The world's longest known cave system.

Two small markers remember the Alamo's feline protectors.

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

The highest point in Texas is capped by a big silver pyramid.

A pair of giant legs paying homage to a poem, a king, and it would seem, socks.

Visitors can walk over the largest concentration of Columbian mammoths to have died from one event.