TUUSULANJARVI (LAKE TUUSULA): Tutto quello che c'è da sapere - Tripadvisor giu 2019 • Lavoro. This large lake has a hop on hop off bus service which goes around the whole lake the cost is 5 euros. Around the lake is various water activities as expected. There is also a walking path around the lake but it is 20+ kilometers. Google Traduttore.