Cisternerne - Museum for moderne Glaskunst (English: The Cisterns - Museum of Modern Glass Art) is a museum in Copenhagen, Denmark, dedicated to modern glass art. It is located in a grotto-like former water cistern that come complete with Stalactites formed by the changing water levels. The entrance being marked by two glass pyramids, the museum is located beneath Søndermarken park next to the Zoo. In February 2009 Forbes listed Cisternerne as one of the more unusual exhibition spaces in Europe.