The Sázava is a river in the Czech Republic, flowing for about 225 kilometers. It originates in the Bohemian-Moravian Highlands and eventually merges with the Vltava River near Zbraslav. The river is known for its picturesque landscapes and is a popular destination for outdoor activities like kayaking and hiking. The Sázava basin is rich in biodiversity and features various flora and fauna. It also has historical significance, with several towns and castles along its banks, including Sázava Monastery, which dates back to the 11th century. The river plays an important role in the region's ecology and culture.