A wide range of tour operators and individual guides provide opportunities to venture into less well-known areas of Prague, or learn more about certain historical sites with licenced guides or escape to the countryside. The corner of Old Town Square and Paris Street is usually packed with dozens of people touting for business as walking guides; the quality varies. Some operators do have kiosks selling tickets and some you just join by turning up at the starting point. Besides walking tours, you can join some theme tours specializing in Jewish history and other subjects. Horse-drawn carriage tours, vintage car tours, or hop on and off buses are other ways to explore Prague, although mostly not guided. There are also tour operators organizing one day excursions into the surrounding towns like Kutná Hora, Karlovy Vary or Český Krumlov.