There are lots of Frank Lloyd Wright homes out there, but not many of them feature private parking for your client’s helicopter. This listing actually features three properties on Petre Island, two of which were designed by the renowned architect. The main residence is a 4-bedroom house cantilevered over Lake Mahopac, which is coupled with a 1950s-era guesthouse nearby. The property also comes with a teahouse, a private beach, a dock and a helipad. Priced at $12.9 million, the listing is situated on more than 10 acres in Carmel, New York. (Photo courtesy of Douglas Elliman)