With an 11-hour layover in Amsterdam, you have enough time for a very satisfying "city taster." After landing at Schiphol Airport, take the 15-minute train directly to Amsterdam Centraal. From there, you should immediately take a Canal Cruise (the docks are right outside the station) for a 60-minute narrated overview of the city's historic architecture. Afterward, you have time for one major museum, such as the Rijksmuseum or the Anne Frank House (both require pre-booked time slots weeks in advance). For a more relaxed experience, walk through the Jordaan neighborhood for boutique shopping and a "pancake" lunch. If you have 3–4 hours left, visit the NEMO Science Museum roof for a free panoramic view of the harbor. Aim to head back to the airport at least 3 hours before your departure; if you have a few hours left but don't want to leave the airport, Schiphol features a branch of the Rijksmuseum and an extensive library right in the terminal.