Once in disrepair, this popular Texas stop along iconic Route 66 has been restored to its past glory.

This refurbished gas station is one of the oldest in Texas, located on the original Route 66.

This water tower slanted at an uncomfortable angle off the old Route 66 was an ingenious marketing ploy.

This Florida sinkhole hides a rainforest-like micro-environment in its depths.

The final resting place of one of the United States's greatest poets.

A Florida college boasts the world's largest single-site collection of structures designed by Frank Lloyd Wright.

This twice-relocated "Usonian" home is among the smallest built by master architect Frank Lloyd Wright.

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

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

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

A white oak with property rights.

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

A mysterious inscription may hold a clue about the "Lost Colony" of Roanoke.

These eerie outliers of the lightning bug family glow a mysterious blue color.

A curious whirlpool formation supposedly capable of entangling or engulfing branches, tree trunks, or whole rafts full of hapless tourists.

A mysterious monument meant to be a guide into "an Age of Reason" was destroyed after an apparent bombing.

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

A replica viking ship from the Chicago World's Fair is still in dry dock in an Illinois park.

Shop of curiosities with a dinosaur museum tucked in its basement.

This shop for all your super spy needs hides an educational secret.

The site of a 19th century "dream city" that almost rivaled Chicago before being swallowed by the Indiana sand dunes.

A house carved into a rock in the 1940s.

This 24-acre park offers a place for meditation in the midst of Sedona's iconic red rocks.

A giant lumpy candle serves as a beacon for this highly scented pit stop.