A historic landmark and museum filled with curious objects representing the history of Key West.

The museum chronicling a treasure hunter's dream, fulfilled.

The highway's southernmost spot is a beloved local attraction.

Two hundred tons of pioneer artifacts were painstakingly recovered from a shipwreck at the bottom of the Missouri River.

An idyllic swimming pool tells the tale of Hemingway's trouble with women.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

A monument celebrating the idea of reaching inaccessible places.

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

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

A cannon designed to fire an atomic warhead.

This unconventional used book store was once in the news for the surprising act of burning books.

This recently restored timepiece has stood all around Kansas City.

Giant granite rocks standing end-to-end like a train of circus elephants.

Erosion and time have created a naturally-formed water park.

This historic hotel invented the chocolate brownie.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

Rare and gorgeous birds abound in this protected wildlife sanctuary.

Home to the deepest rift anywhere on Earth.

A towering tribute to decisiveness stands on the spot where Brigham Young and his followers decided that this must be the place.

The fifth-longest natural arch in the world, and the longest outside China.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

Even Henry David Thoreau found this glacial pothole irresistible.

The second-largest gold nugget in existence, displayed in a Las Vegas casino conveniently named the Golden Nugget.

A giant open-air sculpture made of over 200 full-sized boats.