Vartiosaari is an island located in the inner archipelago of Eastern Helsinki, between Laajasalo and Tammisalo. On the island there are several villas, some private, some rented by different associations. There's also a nature trail, along which you'll find eg. an erratic block, a giant's kettle, a lamb stable to mention a few.

A connection boat by Suomen Saaristokuljetus to Vartiosaari operates in summer from Laajasalo, Hakaniemi and Vuosaari. Also the new electric callboats service from Laajasalo operate in summer season 2021 (, departure from Reposalmentie 2).