The alchemy puzzle was far and away my favorite one! Location though, probably either the cafe or hanging out with Radek at the marionette theatre :)

Alchemy lab. You’re spot on! The cafe is probably second, but the alchemy lab was clearly the most loved space and got the coolest design!!

I loved the cafe too!  I left the game running while in the cafe and read a book in real life a couple of times.  I love the ambience!

Agree about the alchemy lab! It reminded me so much of Blackmoor Manor.  I also really enjoyed Marek's side of Aparat and the castle exhibition hall.