Chladná dolina, Natural monument in Lukov, Czech Republic

Chladná dolina is a natural monument protecting forest stands with tufa springs on a steep southwest- to west-facing slope above a left-bank tributary of the Bělovodský potok, 2.1 km north-northwest of Lukov. Its 0.4950 ha of tufa springs lie in the northeastern part, within 50–60-year-old forest.

Chladná dolina is a natural monument protecting forest tufa springs and beech woods on the slope above a tributary of the Bělovodský potok, 2.1 km north-northwest of Lukov. Since 15 April 2005 it has formed part of the Velká Vela Site of Community Importance under Natura 2000, with a total area of 770.6784 hectares.

The name Chladná dolina, "Cold Valley", refers to the shaded valley above a tributary of the Bělovodský potok. The protected area lies in the Lukov cadastre, 2.1 km north-northwest of Lukov village, and forms part of the Velká Vela Natura 2000 site, declared on 15 April 2005.

Access is through marked hiking trails with green and yellow blazes that connect to a larger route around the area. The flat, wooded terrain makes walking relatively easy for most visitors.

The calcareous sandstone and conglomerate bedrock lets several forest tufa springs form in the northeastern corner, on 0.4950 ha. A textbook tufa spring lies about 500 m south-southeast below the Rybárka well, just outside the protected area. The woodland there is 50 to 60 years old.