A rail pass is a ticket that allows unlimited travel on a specific rail network for a set period. It is often used by travelers who want to explore multiple destinations without purchasing individual tickets for each journey. Rail passes can vary in duration, coverage, and pricing, making them a flexible option for frequent train users. Many countries offer their own versions of rail passes, such as the Eurail Pass in Europe or the Japan Rail Pass in Japan. These passes can provide significant savings and convenience, especially for tourists looking to visit various cities and regions efficiently.