For a relatively small city, Helsinki has an impressive number of museums worth visiting. Since you are only here for the weekend, however, we suggest you try these three.
The recently renovated Kiasma Museum of Contemporary Art, located next to the train station, is a must see for anyone interested in contemporary Finnish art. Architect Steven Holl has said that the most important building material for him in designing the project was light. And indeed, northern light follows you as you walk through the museum, changing with the time of day and the seasons.
The Design Museum is located in the heart of the Design District and is an essential primer if you want to learn the history of Finnish design.
Didrichsen Art Museum is one of several private art museums in Helsinki. Situated on the island of Kuusisaari and accessible by car or boat, this is the original home of collectors Marie-Louise and Gunnar Didrichsen. Designed by Viljo Revell, it is a fine example of Finnish modernist architecture and the surrounding sculpture garden is magical.