Thanks to a loophole in property ownership, this alleyway has become a cacophonous street gallery.

An entire city block built completely out of petrified wood.

Known as "The Hill of the Little Devils."

The cliff and rock formations are made out of Sioux Quartzite.

The lowest point in South Dakota and the source of the Minnesota River.

More than 7,000 gallons of water pour over these cascading red quartzite waterfalls every second.

This vintage train once gave new meaning to “swimming upstream.”

One of the largest private collections of fossils in the world.

A remnant of the last Ice Age, this lake is surrounded by fascinating rock formations.

This sinkhole in the Arizona desert is filled with carbonated, arsenic-rich water

This hidden gem in Arizona is truly worth the rugged journey.

A 315-foot spire jutting out from the Blue Ridge Mountains makes for breathtaking views.

In a pedestrian tunnel on North Carolina State’s campus resides an expressive and artistic free-for-all.

A mountaintop space observatory that is certified dark.

Beautiful Gothic-inspired lighthouse stands out among the run-of-the-mill striped fare on Bodies Island.

This granite rock face is named for the magnificent reflection that occurs when the sun hits it just right.

The scant remains of this flooded historic village can be explored in one of the most remote areas of the Great Smokies.

Perhaps the oldest vine in North America, this sprawling plant helps make a sweet wine.

The highest point in North Carolina and the United States east of the Mississippi River, Mount Mitchell is named after argumentative explorer Elisha Mitchell.

This scented city oasis was a labor of love.

The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

Every week, a festive public jam session breaks out in downtown Asheville.

This rare basilica nestled right in downtown Asheville is an architectural marvel, inside and out.

This homegrown adoption center offers a wonderland of feline companionship.