Czechia is known for its picturesque Bohemia and Moravia landscapes that are perfect for cycling and hiking. The best time to visit the Czech Republic is between May and October, as this time offers the best weather for outdoor activities. July and August are the most popular months to go on the Vltava river cruise and climb Broumovské Stěny (Broumov Walls). In July, Colours of Ostrava, one of the most famous music festivals in Chechia, is held in Ostrava, close to the Polish border. Early autumn is perfect for visiting medieval Houska Castle surrounded by beautiful forests as well as Soos National Nature Reserve.