Yes, you can walk between all terminals at Amsterdam Airport Schiphol (AMS) without needing a shuttle bus or train. Unlike many major global hubs that have separate buildings, Schiphol is designed as a "One Terminal" concept. The single massive building is divided into three primary Departure Halls (1, 2, and 3), which are all interconnected airside (after security). This layout is highly convenient for transit passengers, as you can walk from any gate to any other gate within the secure zone. However, the distances can be quite large; a walk from one end of the airport (Pier M or H) to the other (Pier B) can take 25 to 30 minutes. Schiphol features moving walkways (travelators) to help speed up the journey. Travelers should also be aware that if moving between "Schengen" and "Non-Schengen" zones (for example, arriving from London and connecting to Berlin), you will still need to pass through a passport control point within the terminal building despite remaining in the same structure.