- Discover Tallinn’s best sightseeing destinations in the easiest and most convenient way! - Choose from three different bus routes and enjoy unlimited hop on and off rides - The Red Line stops at the city’s 8 historic destinations, perfect for those with limited time - Those who like panoramic views of the city harbor can take the Green Line with 12 bus stops - Enjoy shopping and visiting the zoo when you take the exciting Blue Line, available every May-Sep