Many tourists also enjoy the city's array of districts and landmarks, including the tilting Montelbaanstoren leaning tower of Amsterdam, built in 1606, the Anne Frank House, Trope museum, and the NEMO, a science museum built to look like a sinking ship. One of the most bicycle-friendly cities in the world, Amsterdam is often called a center of bicycle culture, to the extent that in many areas, use of automobiles is discouraged, with many streets closed to traffic other than bicycles. However, the city is also easy to navigate via tram lines and metro trains. Amsterdam, for centuries has been a major trading center and even today you will find many buzzing neighborhoods and streets, the Kalverstraat, Rokin and Pieter Cornelisz Hoofstraat & Van Baerlestraat. Life After dark in this enchanting city is simply out of this world and whether you choose one of the trendy bars or a chic nightclub, you will definitely have a blast.