The Interrail One Country Pass is a travel ticket that allows unlimited train travel within a single European country for a specified number of days. This pass is ideal for travelers who want to explore one country in depth, offering flexibility and convenience. It is available for various countries, including Italy, France, and Spain. Travelers can choose from different durations, typically ranging from 3 to 8 travel days within a month. The pass is valid on most trains, including high-speed and regional services, making it a great option for discovering cities and scenic routes across the chosen country.