Helsinki Central Railway Station (Rautatieasema), Helsinki

I can't comment on its quality as an actual railway station, but this building has one of the most incredible facades in Helsinki, so is definitely worth a visit for architecture buffs. It looks like something out of Fritz Lang's Metropolis, with these giant figures of men carrying balls over an art nouveau entrance. It was designed by Eliel Saarinen and built just before WWI. Apparently it was intended as the terminus for trains from Russia but the Cold War put paid to all that.

Directly behind the station is one of Helsinki's larger parks and wooded areas, so you could set off on a great walk.

Whilst the station's architecture is quite grand the service itself is not. The ticket machines are only in Finnish or Swedish. This would be fine if it weren't for the fact that the desk service is very slow. Despite this, the staff are friendly, the station is easy to navigate and its location is great.