Whether you will be a first-time traveler to the Nordic countries or are eager to continue exploring, here are a few unusual destinations for you to consider visiting.

The subterranean city below Helsinki, Finland is part of a 60-year expansion that began in the Cold War era. Visitors find a surprising array of shops, an ice rink, swimming pools and even art at the Amos Rex Museum.

Helsinki, Finland

Looking to experience the Viking Age? Then plan a trip to the Trelleborg Viking Fortress, near Slagelse in West Zealand, Denmark. Originally constructed around A.D. 980 by King Harald Bluetooth, the fortress museum showcases Viking crafts and history. There’s also a Viking festival each summer.

Trelleborg Viking Fortress

Established in 1975, the Norsk Hermetikkmuseum (Norwegian Canning Museum) is found in the historic area of Gamle Stavanger. With novel hands-on activities like packing sardines, and a colorful collection of canning labels, it’s a surprisingly fun way for all ages to learn about Norway’s fishing industry.

Gamle Stavanger

Where can you go to see the benefits of geothermal activity? Iceland! Plan a tour of the Hellisheiði Power Station to view giant turbines and more. You’ll learn how the country generates much of its electricity and hot water by taking advantage of shifting tectonic plates far below the island.

Hellisheiði