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

A beautiful botanical garden in the heart of the Natural State.

Crystal hunters can dig for their own stones at this DIY mine in Arkansas’ quartz belt.

The only diamond mine in the world where you can keep what you find.

The longest floating boardwalk in the United States.

This Texas home and garden was the masterpiece of a British portrait painter.

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

An enormous pink granite batholith, long attributed with spiritual powers by the Tonkawa Indians.

An ivy-covered arch bridge dedicated to Tejano music singer and legend Rosita Fernandez.

American revolutionaries and British soldiers alike are buried here in the fourth-ever cemetery in Boston.

The site of Paul Revere's historic two lantern warning.

This landmark cemetery in Boston was created more than 300 years ago.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

A "Texanic" (gigantic Texas) collection of Art Deco architecture at Dallas' historic Fair Park.

This downtown Dallas art installation is always on the lookout.

A taste of Middle Earth, in the middle of the Bayou City.

This hidden sculpture garden full of Wild West art is one of San Antonio's best-kept secrets.

Three hundred years of preserved Spanish colonial history in San Antonio.

A 131-year-old wunderkammer of Texas history.

A gorgeous garden oasis with winding paths, stone bridges, and a troubling history.