Very nice hotel with a huge aquarium in the middle...

Very nice hotel with a huge aquarium in the middle of the lobby. 25m high and 1000 cbm of water. The rooms are available either with a view of the lobby / aquarium or outside. The cocktails are very well prepared and are between 10-15 euros.
From the hotel (which is located directly on the Spree) you can quickly reach the Alex, the Museum Island and many boat docks.