Air Tower

Looking in the distance, there seems to be a tower of some
sort showing through the clouds. It appears to be plain in
nature but strategically placed. There is a stone bridge
that begins here, leading towards the building. It is
narrow but solid enough looking from this point.

Map

Ground

1st Floor

2nd Floor

3rd Floor & Roof

+hints

1. you need an invitation to get into the highest area

2. Raoul has one but he is sick and can't go

3. he might trade his invitation for some medicine

4. one of his neighbors might have some.