On which building am I?

Julius_Henke  -  August 25, 2020

I live in a country that looks like something you can wear.
We have quite a few volcanoes and some of them are still active.
Sometimes I am annoyed by all the tourists visiting.
To my left I see a very important court.
On my right I see a small city state.
In front of me there is a river, which at some point flows into the sea.
I am standing on top of a museum.