The Sopot Lighthouse stands near the entrance to the Molo, a 23-metre cast-iron tower built in 1904. It's operational and not generally open for climbing, but it makes a good orientation landmark and is worth a look at close range for the engineering of the thing — a Victorian-era structure still doing its job over a century later.
The lighthouse marks the boundary between the public beach and the pier area, and the small square around it is a natural gathering point in the evenings. The maritime character of this corner of Sopot — pier, lighthouse, fishing boats — is distinct from the resort atmosphere of Monte Cassino Street.