The Interrail Global Pass gives you flexible train travel across 33 European countries with a single ticket, making it ideal for multi-country trips or long journeys across the continent. You can choose between continuous passes (valid for 15 days, 22 days, 1, 2 or 3 months of unlimited travel) or flexi passes that give you a set number of travel days within a longer period, such as 4, 5, 7, 10 or 15 days within a month. You can hop on most trains without a reservation, although high-speed and night trains in countries like France, Italy and Spain often require paid seat reservations. The pass is valid for European residents only, with discounted prices for youths, seniors and children travelling with adults.