Patent ID: 7273019

Claim:
A structure that may be used in a body of water, which comprises: (a) a multi-level structure having a lower level and an upper level, wherein the lower level is tall enough to accommodate at least a watercraft therein, and wherein the upper level includes a weight bearing deck that is strong enough to support a plurality of people and furniture in a first entertainment area on the structure; (b) at least a pair of wheels that can be at least temporarily attached to the lower level of the structure to allow the structure to be transported by ground to and from the body of water and to be rolled into and out of the body of water; and (c) a ballast system carried on the structure which may be selectively emptied of or filled with enough water to selectively change from a buoyant state in which the structure floats on the body of water to a non-buoyant state in which the structure does not float on the body of water, wherein the ballast system adds enough weight to the structure in the non-buoyant state of the structure such that the structure sinks in the body of water until the structure engages against a bottom of the body of water.