The next sentence: ¿Dónde está la catedral? From here on Gregor only adds por favor where Elena says it too – whether you add it is up to you.
You ask someone in the street for the cathedral, and he points out that it is about to start thundering (dónde). Then he points to branches with big cups – big because the ta is stressed (está). You set off laughing (la) and see the cathedral, perhaps the one by Gaudí in Barcelona. On the roof a cat (“Katze”) is drinking tea and does a twist – “Drall” – as it jumps down (catedral).