Thomas Point Shoal Lighthouse.
My favorite lighthouse, the Thomas Point lighthouse is one of those classic and iconic pieces of Chesapeake Bay heritage (originally built in 1825, it has quite the history, check that out here). It also currently still acts as a navigational aid for the Bay waters. The lighthouse is a National Historic Landmark and is only one of ten lighthouses to be bestowed with that honor. (Donate to the preservation here)
Who else has a favorite lighthouse?