Olkhon

Khuzhir Museum
ul Permovayskaya 24
10AM-6PM

The museum is cheap, in fact it's rather random if they charge entrance or not, and there is an exhibition with local artifacts — mainly related to the islands shamanistic roots, but also some displays that will familiarize you with the history and sites of Olkhon. A great option for your arrival day, as there usually isn't much else to do.