Spencer Spit is an example of a sandspit enclosing a saltchuck lagoon. The spit was formed over a long period of time by the action of wind and tide. The spit is constantly changing. Eventually, it could fill with sediment and lose all its water.
The stone cellar of the old Spencer house can be seen near the spit. A replica of the original log cabin built by the Spencers for guests is out on the tip of the spit.