• Clear skies only, since each show is confirmed on the day by the weather, so check the observatory page before you set out
• Dress for the cold: the tower has no heating, and on busy nights you may queue outside before getting in
• No toilets or step-free access: the tower sits at the top of a fairly steep paved path, and a narrow spiral staircase leads up to the dome

A small domed tower on the highest hill of Kaivopuisto Park, built in 1926 by the Ursa Astronomical Association. At evening star shows, visitors take turns at the telescopes to look at the Moon, planets, star clusters and nebulae while a guide explains each one. Summer shows point filtered telescopes at the Sun to see sunspots and prominences. The Helios sundial sculpture stands out front.