Completed in 1905 on the site of a former fish market - this is where the name comes from. It has never served a defensive purpose: it is an excellent lookout place. The floodlit row of bastions offer a panoramic view onto the other bank of the Danube. The cityscape opening up from there, including the Fishermen's Bastion, has been part of UNESCO's World Heritage since 1988. The crypt of the ancient St. Michael Cemetery Chapel (the first written record dates from 1443) was opened to the public in 1997.