Ancient petroglyphs discovered only after a massive fire swept across Michigan in the 1880s.

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

Turnip-shaped island just off the Michigan shore in Lake Huron.

Centuries-old hoofprints and wagon tracks reveal themselves after a good winter storm.

The oldest playground in America.

A mysterious collection of stones stand outside a small New England town.

Over 50 whirling pools left behind from the glacial age.

One of the most scenic falls in Massachusetts has a history of death and grim legend.

Friction between grains of sand cause a curious "singing" sound.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

After hundreds of years of settlement, this once-bustling fishing village sunk into the Chesapeake Bay.

The land is home to swimming ponies and a legendary 18th-century treasure.

True to its name, this bouncy walkway may be the world’s smallest suspension bridge.

A miscalculation turns a very shallow freshwater lake into a very deep saltwater lake.

A small park on Bourbon Street features life-size bronze statues of New Orleans musicians.

A snapshot of the city's fascinating voodoo culture.

Beautiful waterfalls grace a canyon visibly torn by a violent tornado.

An enormous natural sandstone bridge in Kentucky.

Moonbows over Kentucky.

The world's longest known cave system.

A rainbow-colored house promotes LGBTQ rights across the street from the Westboro Baptist Church.

A landscape of massive spherical boulders are the main attraction in this Kansas State Park.

Curious rock formations in a tiny Kansas state park.

One of the Eight Wonders of Kansas and the first official National Natural Monument these stark formations look like nature's Stonehenge.