Observation tower on Chełmiec, Observation tower in Wałbrzych County, Poland.

The Observation tower on Chełmiec is a 22-metre stone tower built in 1888 in the shape of a mock castle turret, standing on the 851 m summit above Wałbrzych. Its rough porphyry masonry carries a square wooden cabin with windows near the top, a metal antenna frame and flag above, and a single-storey wooden annex with pointed windows at its foot.

A stone viewing tower was built on the summit in 1888, 22 m high and shaped like a mock castle bastion, modelled on the ruins of Stary Książ castle. In the 1920s and 1930s car rallies ran from Boguszów to the summit. After World War II a building was erected for the RTON Chełmiec facility, where jamming transmitters for Radio Free Europe were installed; a 69 m telecommunications mast followed in 1973, and a new mast was built in 2012.

The tower was built in 1888 as a stone imitation of the ruined castle Stary Książ. Since 2000 the 45-metre cross beside it, consecrated by Bishop Tadeusz Rybak on 23 September 2000, has hosted open-air Masses and local pilgrimages organised by church institutions of the Świdnica diocese. Its construction stirred controversy over damage to the mountain's natural setting and its cost.

The tower is open from April to October, daily 10:00–18:00, with entries at 30-minute intervals. The easiest approach is the green trail from Boguszów-Gorce, passing the miners' Stations of the Cross; a yellow trail also leads to the summit. Transmitters stand right beside the tower and can spoil photographs.

The tower was built in 1888 as a copy of the ruined castle Stary Książ, which is why it looks like a sham castle turret rather than a modern lookout. Its 22-metre shaft is made of Permian porphyry, the rock of the Chełmiec massif. Next to it stands a 45-metre cross, the tallest in Poland, consecrated on 23 September 2000 by Bishop Tadeusz Rybak.