Espoo (Swedish: Esbo) is the second largest municipality in Finland with the population of 281,886. It is part of the Helsinki Metropolitan Area along with the municipalities of Helsinki, Vantaa, and Kauniainen. The national park of Nuuksio is situated in northwest Espoo.
Espoo is served by Helsinki commuter trains, with 3 faster E, U and Y trains (25 min from Helsinki) to Middle- and West-Espoo. In addition, the A train (every 10-20 minutes, 17 minutes from Helsinki) serves the east part of Espoo. The Finnish National Rail commuter traffic section has route maps and timetables online.