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Photo: Niels Elgaard Larsen - User: (WT-shared) Elgaard at wts wikivoyage, CC BY-SA 4.0 via Wikimedia Commons
A marvelous zoo, with a rain forest glasshouse, tiny apes, aquariums with sharks, and terrariums with reptiles and venomous snakes. Other highlights include an interesting exhibit of Mediterranean sea life and the aquarium's beloved sea turtle, "Puppi." The apes and birds are allowed to freely mingle with the visitors, but don't attempt to touch or feed them. It is in one of the surviving air raid defense towers from WWII, a so-called Flakturm. During wartime, the building provided fire control for Vienna's anti-aircraft artillery, housed some of the first radar equipment, and is designed to withstand a direct bomb hit, an earthquake, and wind speeds up to an overpressure of ten bar. Its former gun emplacements are now a platform on top affording nice views over the roofs of Vienna.
The Haus des Meeres is a public aquarium in Vienna, Austria. It is located in Esterhazy Park in the centre of Mariahilf district, one block south of the busy Mariahilfer Straße. The Haus des Meeres houses over ten thousand aquatic beings on an area of around 4,000 square meters (43,000 sq ft) inside a tall concrete flak tower built during World War II. In 2012 the Haus des Meeres attracted a record high of 650,000 visitors. The Haus des Meeres is managed by Aqua Terra Zoo, a private non-profit organization which, according to its web site, receives only marginal financial support from municipal authorities. However, the maintenance costs for the former flak tower are paid by the taxpayer.
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On one side of the 2nd Worldwar bunker there are routes to climb high up until its roof with great views into the roofs of Vienna. The routes are usually hard and require some endurance. The alpine club organises courses for beginners and intermediate. On the other side there are boulder problems set. The outdoor climbing in middle of a historic city makes this a favorite choice for many climbers during the hot season.
A Cineplexx theater with plenty of choices including original versions. The cinema opened here in 1905. According to seat numbers it is one of the biggest in Vienna.
English Cinema Haydn
The theatre projects mostly English films in original version.
Haydn's House
Joseph Haydn spent the final twelve years of his life in this home, during which time he composed the oratorios The Creation and The Seasons. The house has been a museum since 1899, and careful restoration has included the small garden, which is now also open to the public.
The staircase connects the Mariahilfer and the Gumpendorfer Strasse. It was built in 1870.
During football championships they show the games in one of the cinema theatres. It is screening international artistic productions. For the bar see the drink section.