This architectural stunner is one of the few surviving Egyptian Revival theaters in the U.S.

An antiquated German apothecary on Chicago's North Side.

Giant six-pack could provide one person a six-pack a day for 3,351 years.

This circus town museum recognizes the outstanding clowns of history.

The remains of a enormous earthen figure of unknown origins cuts across a rural Wisconsin road.

The building is topped by a Statue of Liberty statue whose torch has stayed burning since the museum opened.

The world's largest collection of mechanical puzzles is a cornucopia of analog bafflers.

A chilling disappearance (and rescue) of a child uncovers a geological mystery.

A rural hall of justice holds the world's only comic book and superhero museum.

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

The longest navigable underground river in the United States is home to countless blind and albino animals.

A hidden network of subterranean passageways lies tangled beneath Indianapolis' bustling City Market.

A medical facility that has been kept frozen in time.

The world's only known button museum.

This museum celebrating the almighty dollar lets visitors literally stand in the shadow of a million bucks.

Largest tulip festival in America, includes fireworks, a parade, and a carnival.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

A museum that houses the world's largest collection of ventriloquism dummies.

There is a small island in the Gulf of Nicoya where the only human inhabitants are dead.

A secret climbing tree hides along the side of a Costa Rican road.

One Costa Rican island is so beset by illegal shark poachers that the local rangers have built an entire bridge with their confiscated gear .

This neon blue river gets its color from a unique mix of bacteria and volcano minerals.

Sloth rehabilitation center in the jungle of Costa Rica.

You have to love a museum with a truly dedicated focus. A focus on Superman, for example.