Lions and tigers and leopards, servals, pumas, bobcats, lynxes, and ocelots... oh my!

A turn-of-the-century architectural marvel built on healing mineral springs and salt licks.

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

A stunning, abandoned limestone quarry in southern Indiana provided the stone to erect the Empire State Building.

A river with some unusual, and occasionally dangerous, habits.

Half-sized replica of the Leaning Tower of Pisa built to honor Galileo.

Eclectic collection of rare and beautiful stones in a historic home.

The legacy of an unsolved, gruesome murder rests beneath the spans of this historic bridge.

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

This sprawling mini-golf empire is an impressive testament to a disappearing attraction.

An Idaho legend carved out a cave village with his own two hands.

A wild west land agreement was etched right onto this historic Idaho stone.

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

Step back in time on this preserved 1800s farm.

The remnants of a wooden-hulled fleet built and abandoned in WWI, now home to a thriving ecosystem.

The only working large-scale tea plantation in the United States.

Thousands of tiny squares in different colors make up this piece of street art.

A historic blockhouse and trading post give a glimpse into the early colonial history of South Carolina.

This 5-by-6-foot wooden hut is the smallest historic post office in the U.S.

An annual celebration of the region's successful elk reintroduction program.

One of the oldest living oak trees in the Southeast.

Near-constant high winds deform the trees on Spruce Knob, the highest point in West Virginia.

Who needs fancy modern water slides when this giant North Carolina rock works just as well?

The Virginia home of one of the signers of the Declaration of Independence is being preserved with a unique glass facade.