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

This unique zoo is the only place in the world where you can see all 15 species of crane.

A museum devoted to the victims and the survivors of the most catastrophic fire in American history.

One Austrian's singular yard is now preserved as a folk art garden of concrete wonders.

An oddly poignant roadside attraction celebrating American folklore.

Statue dedicated to the star of an old television show.

A giant, Gilded Age mansion that once belonged to the beer baron of Milwaukee.

A house and yard adorned with bizarre concrete sculptures in a Milwaukee suburb.

A place to eat for on-the-run agents and espionage enthusiasts.

This cave holds a surprisingly colorful variety of geological oddities.

The world’s largest truck stop includes a barber shop, chiropractor, and a huge museum with antique trucks.

A museum dedicated to exhibiting remarkable outsider art.

The land is home to swimming ponies and a legendary 18th-century treasure.

World War II-era bunkers are hidden under the beaches of this picturesque park, which is still scattered with wartime watchtowers.

Glacial erratic or man-made dolmen? It probably wasn't druids.

A French chateau, failed utopian community, odd museum, and Stonehenge replica in rural Washington State.

A fitting attraction for the corn capital of the world.

This statue inspired by Renoir's famous painting embodies the jovial spirit of Key West.

One of the world’s largest and deepest freshwater springs, where mastodons once roamed.

Pensacola's UFO home has withstood many hurricanes—just as the experimental 1960s design intended.

The largest retailer of seashells in the world.

One of the only Florida forts to remain in the hands of the Union all through the Civil War still stands as a historic stronghold.

Manatees congregate around a power plant's discharge canal where the water is especially warm.

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