An architect's childhood fantasy treehouse made real.

The world's only three-story rotary jail is now a museum to a bizarre trend in prison design.

An idle pastime becomes a record holder in Boys Town, Nebraska.

The fastest mail service in the west is tracked and memorialized along this 1,400 mile trail.

Piled high inside this warehouse and coffee shop are salvaged goods that span every corner of the globe.

A rainbow of kulfi and falooda flows from this Indian-style ice cream parlor.

A 22-foot stainless steel quilting needle pays tribute to a local connection to fiber arts.

Located inside a former bread factory, this museum explores a century of transportation history through innovations that were extraordinary or failures—sometimes both.

An ode to "The Queen of Appalachia."

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

This seasonal soft serve shack has been doling out silky swirls since 1951.

The world's largest version of this iconic puzzle cube is located in Knoxville, Tennessee.

Classy up your Big Mac with bow-tied servers and chandeliers at the world's fanciest McDonald's.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

This small museum houses rare airplanes from aviation's golden age.

The oldest operating Mississippi River–style steamboat still navigates the Ohio River.