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Photo: HendrixEesti, Public domain via Wikimedia Commons
The town hall was built after the Second World War though unlike most other buildings from this era it's not entirely in Stalinist style but draws elements from Tallinn's old town too, in addition to the Kremlin in Moscow.
© OpenStreetMap contributors
Built in 1987 to celebrate the 70th anniversary of the Russian revolution, which is stated on the plaque, it's one of the increasingly few Soviet monuments in independent Estonia. It depicts a worker lifting up an "atom" that is comprised of electrons but no nucleus.
Приморский бульвар/Primorski bulvar
From the central square, stairs lead down to the "boulevard to the sea" as the street is named in both Estonian and Russian. The iconic view of Sillamäe, it looks more like a place next to the Black Sea, Lake Geneva or the Mediterranean than in Northern Estonia.
A former residential building, modified in the 1990s to become an Orthodox church. It looks a bit unusual, though it's beautifully set next to the river.
Sillamäe muuseum
The local museum has a range of different exhibitions related to geology, oil shale and the related industry, daily life during different eras, music including radios, record players and instruments, a collection of dolls and various temporary exhibitions.
Built in 2001 in modern style.