No visit to Sweden would be complete without getting up close and personal with some cute little red wood houses and Dragsö does not disappoint when it comes to providing one of the best examples. The island has a gorgeous little cluster of red wood summer homes at Brändaholm. In addition to this, Dragsö has some lovely beaches; great for swimming in the summer and for quiet, isolated walks in the winter. Dragsö also hosts a large camp site, which includes all the usual amenities and a fun little mini golf course. Dragsö is a fair way out of Trossö, so consider taking a bus, putting on some good walking shoes or hiring a bike.
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A large rock connected by bridge to Trossö, Stakholm has 360-degree views and is a popular sunset picnic spot.
On the west side of Trossö north of the naval yard are several streets that feature a lot of the cute little cottages that were used by workers at the naval yard.
A railway was built through the hill containing the town square to link the main railway to the naval reserve. It's no longer used, but the tunnels can be viewed from several points. On the north side near the town park is best as you can walk up to the gates.
Built on Karlskrona's main square by prisoners of war as a punishment, the Trefaldighetskyrkan is a cute yellow church with a spectacular interior dome - like a wooden version of Rome's pantheon.
In parkland south of the main square is this yellow clock tower. Several of the defunct railway tunnels can be viewed from nearby.