An unknown number of cholera victims are buried in two nondescript graves.

A small rural town hides Indiana's tallest waterfall.

Its columns were all carved from the same white oak tree.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

A permanent outdoor art installation made up of more than 100 mushroom-shaped lights.

This ancient art form was used to capture the lives and struggles of the Haywood Street ministry.

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

Practice your Dirty Dancing lifts in the manmade lake where Johnny Castle himself did.

This shifting North Carolina sand dune is an odd little desert surrounded by oceanic forest life.

This nine-story building can be played like an instrument.

This giant iron playfully pays tribute to an early 20th-century architectural trend.

This North Carolina museum is keeping the pinball craze alive, with a little Space Invaders on the side.

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

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

The fine fabric handwoven at Biltmore Industries was once coveted around the world.

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

An ode to "The Queen of Appalachia."

This replica of the Greek structure is in the heart of Nashville.

This head-spinningly bizarre Depression-era art cave is wall-to-wall quartz and Jesus.

A Memphis park where you can walk the whole Mississippi River in one go.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

This historic New Orleans cemetery is the final resting place of members of the Independent Order of Odd Fellows.

In 1857, the Mardi Gras parade tradition began at this intersection.