There is an interesting one hour maritime tour of the Ría Gallegos on a semi-rigid glass-bottom boat with a capacity for 20 people, visiting the Coal and Fiscal Piers and viewing the northern coast where the pioneer Hill Station Estancia is located.
If time is not a problem you can incorporate to your circuit, Punta Gancho, Punta Loyola, the rich fauna of Isla Deseada and the mystery of the sighting of sunken ships.