"The Bubble" is located at the Korkeasaari Zoo in Helsinki and it's well visible if you arrive to the zoo island by ferry.

It has been constructed by some architect (or something like them) students as an exercise for the school.

It's an experiment at wood construction. Yes, it's all made out of shaped wood constructs...

The thing has three floors and and is intended as a viewpoint tower as it stands on top of a cliff and offers nice views all around.

... but let's go in, shall we... :)

The "ground floor", literally.

The "second floor"

The view up the stairs to the "third floor", with it's open top.

... and a quick look back down to the second floor, before enjoing the vistas offered by the top floor...