Hiiumaa is the smallest county in Estonia (1,023 km²), consisting of
numerous small islands, islets, reefs, and some bigger islands, like
Hiiumaa proper (989 km²) and Kassari (19 km²). Some people lived on
the islets of Hanikatsi and Saarnaki as late as the 1960–1970s, but no
permanent settlements remain there nowadays.
You can get to Hiiumaa via Rohuküla harbour, which is approximately 10
km from Haapsalu. The ferry to the island takes 1.5 hours.