The only Bahá'í house of worship in North America and one of only a handful worldwide.

This historic hotel invented the chocolate brownie.

A curiosity-seeker's paradise set inside a three-story historic school house.

After a water tower painting was accused of being an ad, a simple fix was made that gave the city a motto.

A ceramic-tiled room at the Seelbach Hotel said to have secret tunnels used by Al Capone and a crowd that helped inspire F. Scott Fitzgerald's 'The Great Gatsby.'

A full-scale replica of a 1774 colonial settlement in Kentucky.

This huge clock made of flowers and simple machinery was once used a political weapon.

Kentucky's anomalous peninsula projecting into the Mississippi River, site of legendary earthquakes and local feuds.

This grave marks the final resting place of a legendary frontiersman... unless it doesn't.

The oldest operating Mississippi River–style steamboat still navigates the Ohio River.

Unique tower has outlasted a takeover of the company.

The world's longest known cave system.

This historic Ohio bridge is adorned with fanciful locks left behind by loving couples.

Inside houses a vast collection of military aircraft and missiles spanning the ages.

An unusual, super-sized grocery adventure awaits in an Ohio suburb.

The only known Futuro house in North Carolina sits along a stretch of desolate highway on the Outer Banks.  .

The North Carolina grounds are leased in perpetuity to the British Commonwealth for as long as the WWII sailors are buried there.

So many migrating birds roost on the bridge, it has a special summer speed limit.

The lesser-known lost colony of Roanoke was a safe haven for formerly enslaved people during the Civil War.

Down the road from where the Wright brothers lifted off is another flight tribute practically hidden from sight in the woods.

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

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

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

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