Looks like rather modest villa perhaps, but the world famous Finnish composer Jean Sibelius (1865-1957) lived here together with his wife Aino. Hence the name of the villa: Ainola. The composer loved the peace and quiet this place offered. It was built in 1904 and nowadays a home museum open to visitors. There's also a gift shop with a selection of music composed by Sibelius and books, cards etc. They have nice informative web pages in English.
Open tues-sun from 10 am to 5 pm from 2nd of May through to 1st of October. Closed on mondays and on 23rd June.
There are bus trips from Helsinki arranged by local travel agents.
Well, the only touristy site I can think of in this place is the Sibelius home. The most famous Finnish classic composer used to live here and his spirits live in this place with occasional concerts that held here sometimes.
At the turn of the 19th/20th century, the lakeside area of the lake Tuusulanjarvi became the home of prominent Finnish artists. Here at Ahola, you can see how Juhani Aho, the writer, and his wife Venny Soldan-Brofeldt, the painter, lived. This is usually included in guided tourist tours as part of the Tuusulan rantatie artists' community.
Open from tuesdays to sundays 11-18 up till October. Admission 4 Eur for adults /2 eur for children.
If you are in the area and wonder what to do in the evening, check what's on at Jarvenpaa Talo. They have had versatile performances from theatre and musicals to Finnish pop stars' concerts so you'll never know what they have next. More information and tickets from Lippupalvelu = http://www1.ticketservicefinland.fi
The lake is the main ataraction here and the main activity all year around but especially in the summer. A plcae where you can swim, sail, surf, fishing etc.