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Old, famous and big swimming areal including three big pools (one inside and two outside), fitness, sauna and massages
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Podolská vodárna
This monumental building from the late 1920s might look like a parliament building or at least a town hall, but it's just a waterworks. Located by the Vltava river, the industrial building was built in the neoclassical style by architect Antonín Engel. You can visit the museum of Prague water supply there.
Svět Medúz
A jellyfish exposition accompanied with audio-visual effects, with more than 10,000 jellyfish specimens and 38 aquariums (including one of the biggest sphere-shaped aquariums of the world).
Gröbovka/Grébovka
A quiet little park with an interesting artificial cave building, "Grotta". A good relaxing place near the city center.
"The Bridge of Intelligentsia", officially named Branický most
A majestic railway bridge built in the 1950s, the longest ferroconcrete railway bridge in Europe. It was built by forced labour of members of the intelligentsia, who were transferred to manual professions by rule of communist government. As a monument to the stupidity of the communist rulers, only a single rail was laid on the two-rail bridge, because the second rail didn't fit into the tunnel on one bank. The bridge remains in service to this day and is used mainly for freight trains.
State opera
This historic building of the former German Theatre now serves as the State Opera, hosting mainly operas and ballets.