Every Tues.-Sun. This self-guided tour gives you the freedom to explore outside the city riding to the beautiful Karlstejn Castle. No worries of getting lost! Enjoy the peace of mind that having GPS gives you. This is a 36km ride with rail connections for the return journey if you only want to ride one way. Come for 9:45 and meet new people who also want to enjoy a ride through the Czech countryside, Karlstejn Castle was built in 1348 and has 3 daily guided tours (every day except Monday).