The ´Badboot´ is a floating swimming pool at the Kattendijkdok in the Antwerp district ´Het Eilandje´. This photo was taken from the panorama roof of the MAS building.
And this is the Badboot seen from the ground. Nobody was swimming when I took this photo (unforturnately!), but it is advised to make a reservation if you want to swim here as a maximum of 160 people are admitted in the pool at the same time. With a ticket you are allowed to swim for an hour.
In Winter the Badboot is used as a skating rink.