Why locals love it
"Hey, wanna see a huge fishtank" - might as well serve as a very outworn pick-up line, yet in this case we are indeed talking about a huge fishtank. 25 metres high, 12 metres wide and hosting about 1.500 fish. Plus an elevator on its inside.
Why you should visit it
The good thing about this is: You don't have to visit Sea Life for it, but you can just walk into the building - the Radisson Blue in this case - and have a look at it. Elevator ride excluded of course.
If you really are keen on riding the elevator, you might want to check out http://www.visitsealife.com/Berlin/en/plan-your-visit/aquadom.aspx