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

This concert pavilion on the shore of the Great Salt Lake has been destroyed by fire, water, and disinterest but keeps coming back.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

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.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

The petroleum industry brings you the joys of hydrocarbons and largest collection of antique oil rigs in the world.

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

A pharmacy built in the shape of a mortar and pestle, now resembles a fancy cocktail.

One of the few surviving "Wigwam"-themed motels.

Moonbows over Kentucky.

The world's longest known cave system.

The record holder for the world’s largest peach.

This recently rediscovered Civil War-era submarine was the first to ever sink an enemy ship.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

An unfinished rail tunnel that has since been used to house cheese and bats.

The oldest bridge in South Carolina may have been designed by the same man who created the Washington Monument.

Dental instruments from the illustrious history of American dentistry.

Once the most flame resistant building in the country, the South Carolina Historical Society building was almost burnt down in a fire.

Oldest unrestored plantation house in America that is open to the public.

Charleston's historic city jail once held everyone from pirates to Civil War POWs.

Paths are maintained, but trees have taken over plots.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

This "Plant Farm Museum" is home to the divinely inspired and visionary outsider artwork of Reverend Howard Finster.

FDR hoped to find a cure for polio in this Georgia town's warm springs.