This is the underside of the domes of the Alexander Nevsky Orthodox Cathedral in Tallin, Estonia. We had a pleasant wander round the old city and managed to avoid most of the crowds by keeping to the backstreets!
Wow! I went to Tallin on a day trip from Finland last year when my daughter was on her Skandi Gap. didn't see this and now I definitely want to go back! Great POV and fav.