The trendy 6th district of Vienna, Mariahilf, is bordered by the lively pedestrian street Mariahilfer Straße, filled with fashion and lifestyle stores. The famous Viennese Naschmarkt attracts the gourmet crowds with its’ food,- and market stalls under the open sky. The aquarium "House of the Sea" is in a massive flak tower from the Second World War. The neighborhood's streets give home to hip shops, classic Viennese coffee houses and some theaters.