This complex in the seaside suburb of Kallithea has stunning views from its terrace all the way to the Acropolis on one side and of the coast on the other. Evening concerts and other cultural events take place here. The building, gardens and complex alone are worth a visit, and a free shuttle bus is provided from Syntagma Square. Check the web site for the free (optional) tours in English. The collection of the National Library of Greece is being transferred here, and one wing of the building contains an opera house (this part can only be visited as part of a free tour, if you are not attending an event in the auditorium).