Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

An 18th-century Spanish watchtower made entirely of seashell and concrete.

Must form and function forever remain at odds? Not if the Florida Department of Transportation has its way.

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

One street divides a single town that stands in two U.S. states.

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

Forget Hollywood, one of the biggest stars in the world can be found in Roanoke, Virginia.

An overgrown collection of miniature buildings still stand as evidence of one couple's obsession with The King.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

Exact replica of the ancient monument, but much, much lighter.