The Berlin Zoo is the most visited zoo in Europe, with more than 3.3 million visitors per year from all over the world. It is open all year long and can easily be reached by public transportation. The Berlin Zoologischer Garten railway station (also simply known as "Zoo") is one of Berlin's most important stations. Several modes of transport such as U-Bahn, S-Bahn and buses are interlinked here. Visitors can either enter the zoo through the exotically designed Elephant Gate beside the aquarium on Budapester Straße or through the Lion Gate on Hardenbergplatz.