Commonly known as BTS Skytrain, Skytrain is an elevated rapid railway transit system and the most popular means for getting around in Bangkok. The two lines - Sukhumvit and Silom - cover all major attractions like Chatuchak Park, Siam Paragon, the old town, weekend markets, Chao Phraya River, and Suvarnabhumi Airport. Riding the Skytrain costs THB 16 to travel to one station, while one-day tickets offer unlimited rides at THB 140.