The Korea Rail Pass (Korean: 한국 철도패스; Hangug Cheoldo Paeseu, or Korean: 코리아 레일 패스; Kolia Leil Paeseu), also commonly called the KR Pass (Korean: KR패스; KR Paeseu), is a rail pass offered by Korail (Korea Railroad Corporation), the national railway operator of South Korea. The pass is offered exclusively to foreign visitors and is valid for most of the rail lines operated by Korail in the designated period, including KTX, the high-speed railway in South Korea. However, the pass is not valid for subways and tourist trains, even when they are also operated by Korail (e.g. the subway and commuter lines in Seoul operated by Korail).