A weekend getaway: A private island $10 MM - $100 MM

Can't wait for a submarine? How about a private island. Be sure to
pick one that has a deep water mooring, otherwise there will be no
place for the yacht. If you require banking assistance I hear the
Cayman Islands are popular and close by. Greece, makes a nice summer
trip, but the food is best in the South Pacific.

http://www.privateislandsonline.com/sale-price-over-10M-6.htm