This overgrown Illinois water park offers a whole new type of adventure.

Large one-man sculpture park in Michigan.

This national park dedicated to the tallgrass prairie ecosystem still displays its military past.

This house renovated by Frank Lloyd Wright was the centerpiece of a lavish 20th-century estate.

Cold War missile launch site which has been converted to a public park.

Tucked away amongst townhomes lies a restored, early 20th-century tea house and garden, the only remains of a historic estate.