A half-size replica of the World Trade Center towers above Tulsa.

This ostentatious Italianate palace of an Oklahoma billionaire is filled with several themed mini-museums.

A larger-than-life monument to the overlooked women who braved Western expansion and broke down societal barriers.

Site of the 1926 murder trial of Ernest Burkhart who was involved in the "Reign of Terror."

An oil baron's wild paradise and the winner of an ill-fated air race.

A likeness of Da Vinci's mysterious painting smiles at passersby from the side of a barn.

Nature's biggest mammal swims in landlocked Oklahoma.

This historic folk art garden contains a nightmare tower that claims to be the world's largest concrete totem pole.

This post-war motel embodies a little-known, Miami-born architectural style.

The sign that drew attention to a young boy's cucumber stand is now the name of his fruit superstore.

It turns out that a hurricane-prone beach is probably not the best place to house wild animals.

The smallest post office in the United States is no bigger than a broom closet.

This isolated airport in the middle of the Everglades sees more alligators than planes.

The seat of Buffalo government is a gorgeous Art Deco palace.

A near tragic event on this bridge helped inspire the classic film "It's a Wonderful Life."

For a buck, students can snag freshly picked apples grown in the university orchards.

One of the U.S. Forest Service's only mansions is outfitted with a dinner table for floating food.

Underneath this water pump, Annie Sullivan helped Keller speak her first words.

A 70-foot replica of the famed Eiffel Tower.

A whimsical folk art garden full of punny pieces and a diorama containing 3,500 toys.

A collection of outdoor art by renowned muralist Robert Dafford depicts the history of a flooded city.

Where the author wrote her beloved "Little House" books.

The oldest active juke joint in the state sustains a niche school of blues guitar.

A Muppet museum in small-town Mississippi honors the roots of Jim Henson's most beloved creation.