The sea makes geocaching in the park especially exciting and challenging​.

Skiing is the best way to explore the park in the winter. Watch out for thin ice!

Kaunissaari Nature Information Hut has an exhibition about the park.

There are no marked boating or canoeing routes in the park and canoeing is only recommended for experienced paddlers. You can bring your own tent and stay at a camping site or try the wilderness huts on the islands of Ulko-Tammio and Koivuluoto. Paddlers planning a longer excursion are advised to contact local canoeing clubs for information beforehand.

For those interested in war history, there is a fortification from the days of the Continuation War (1941-1944) on Ulko-Tammio Island. The island's observation tower has magnificent views across the sea. The views from the observation tower on Mustaviiri Island are also breathtaking. Mustaviiri Island is home to a mysterious stone labyrinth and a tiny World Heritage Site: one of the original station points of Struve Geodetic Arc, a chain of survey triangulations. The park also offers many other unforgettable experiences: Feel the power of the sea, watch the migration of arctic birds, visit vibrant villages on the islands, and learn about underwater flora and fauna, seals and the history of fishing, smuggling and seal hunting in the area.

There are entrepreneurs offering guided tours in the park.

There is more to see under the surface! Diving is a great way to explore the underwater world.

Volunteering in Gulf of Finland National Park is a great way to combine valuable work and spending time by the sea. One way to contribute to the park's maintenance is to come along to the annual hay-making event.