The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

Devilish landscape, once cinema home to giant alien bugs, now derelict roadside attraction.

Jail from the 19th century that was built by inmates.

These black pillars of volcanic basalt seem to call mountain climbers with an unbreakable siren song.

A hidden garden of stones engraved with scriptures, a Joseph Smith Sphinx, all carved by one man.

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

This small museum contains fossils from an era when Kansas was underwater.

The juke joint where legendary soul artists ate, drank, and made merry.

This Memphis recording studio launched the careers of Jerry Lee Lewis, Johnny Cash, and Elvis Presley.

This shrine dedicated to the Virgin Mary is also a tribute from a mother to her fallen son.

Meet your friends, marry your true love, or tell your enemies to kiss your butt under this historic Pittsburgh timepiece.

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

The highest point in Alabama was almost completely deforested, but is now home to protected towers and trees.

Auburn's iconic eagle flight goes back to a 19th century eagle that dropped dead on the field after inspiring the football team to victory.

Bad farming practices caused this unnatural natural wonder.

A wealth of local folk art, antiques, and curios, without ever leaving your car.

One of corporate America's best-kept secrets is also one of the most publicly displayed.

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

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

This parking garage was the site of what was - at the time - the largest cash robbery in history.

Historic Hull Street was actually the first street with a proper name in the Boston area.

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

One of the indelible moments of the American Revolution took place at this location.

This area was once known for being a lawless haven for rough-and-tumble sailors, earning the maritime-themed nickname "the black sea."