Rosička observation tower, Observation tower on Rosička Hill in Sázava, Czech Republic.

The Rosička observation tower is a metal structure rising about 42 meters above the hilltop with a viewing platform positioned roughly 24 meters up. From there you can look out across the surrounding landscape and take in the wider region.

In 1930 an aerial beacon, number 7 on the Prague-Kbely route, was placed on the summit to guide night flights between Prague and Bratislava; it was demolished during the Second World War. A triangulation point with a wooden tower later replaced it. The steel tower with a Český Mobil transmitter was built in June-July 2001 after the Babylon tower near Kozárov and opened on 12 August 2001.

The tower's name comes from the hill, which shares it with the nearby village of Rosička. The steel mast also carries a mobile operator's transmitter, so the summit serves both walkers and telephone traffic, and the lookout was ceremonially opened on 12 August 2001.

By car, turn left off the Nížkov–Rosička road to a car park at the edge of the wood below the tower. The nearest station is Sázava u Žďáru, served by local trains between Havlíčkův Brod and Žďár nad Sázavou. The tower is open all year, with an entry fee in summer.

The tower was built in 2001 as a transmitter for the operator Český Mobil, modelled on the tower at Babylon near Kozárov. Its lower section consists of two twelve-metre parts with a diameter of two metres, while the upper part serves the mobile operator.