An ancient cave system in Tennessee’s Appalachian foothills converted to a 1,200-person music venue.

The honor of highest point in Michigan was almost given to the wrong peak before this mountain won out by 11 inches.

Sculptor Vadim Bora's bronze felines pay playful homage to architectural features no longer extant along Asheville's Wall Street.

This sprawling museum holds one man's giant collection of real tanks.

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 U.S. Supreme Court's secret Cold War relocation facility in the mountains of North Carolina.

Strange physical sensations and optical contradictions keep visitors coming back for more.

A small mountain made entirely of banded iron stone overlooking downtown Ishpeming.

As its grandiose name implies, this wooden dome is unsurpassed in size.

This lone tree and dramatic sandstone outcropping are so beloved by Michiganders they can be found on one of the state’s coins.

Beautiful scenery, history, science, and physics come together in this remnant of shipping lore.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

Housed in the university planetarium, the thousand-strong collection of tiny towelettes includes a used one from the hosts of Car Talk.

Perched atop a brick smokestack, this enormous lug nut symbolizes the local minor league baseball team.

The plants form a living library and laboratory for researchers and students at Michigan State University.

Don't be surprised if you see a long-necked dinosaur peeking out from among the trees in Northgate Park.

A young state senator's deathbed plea to be buried inside a rock resulted in this unusual grave site.

This fallen red oak tree has been transformed into a piece of trailside art.

This woodland architectural installation acts as a camera obscura for the heavens.

A water pumping station disguised as a residential home to assuage concerned neighbors now tricks most passersby.

A giant cement churn carries the legacy of American resilience, unity, and greed.

Eighteenth century house of the mysterious "Father of Raleigh."