Smoke rises from the sauna as Eda Veeroja walks past with birch twigs at Mooska farm near the village of Haanja December 20, 2014. Smoke saunas are usually built without chimney and have a stove that rest on boulders where firewood is burnt until the room heats up. When the smoke is gone and the room reaches the right temperature, people sit inside and whisk each other with birch twigs. The tradition of the smoke sauna in Voromaa vicinity, in the south of Estonia, is enlisted in the UNESCO representative list of the intangible cultural heritage of humanity. (Photo by Ints Kalnins/Reuters)

Eda Veeroja looks on as her husband Urmas Veeroja heats up their smoke sauna at Mooska farm, near the village of Haanja December 20, 2014. (Photo by Ints Kalnins/Reuters)

Eda Veeroja draws with ashes a traditional symbol on the door of the smoke sauna at Mooska farm, near the village of Haanja December 20, 2014. (Photo by Ints Kalnins/Reuters)

Smoke rises as Urmas Veeroja heats up the smoke sauna at Mooska farm, near the village of Haanja December 20, 2014. (Photo by Ints Kalnins/Reuters)

Eda Veeroja looks at the stove as the sauna heats up at Mooska farm, near the village of Haanja December 20, 2014. (Photo by Ints Kalnins/Reuters)

Smoke rises from the sauna as Urmas Veeroja and his wife Eda prepare for bathing at Mooska farm, near the village of Haanja December 20, 2014. (Photo by Ints Kalnins/Reuters)

Urmas Veeroja looks on as his wife Eda warms birch twigs for whisking in their smoke sauna at Mooska farm, near the village of Haanja December 20, 2014. (Photo by Ints Kalnins/Reuters)

Eda Veeroja whisks her son Vahur with birch twigs at their smoke sauna in Mooska farm, near the village of Haanja December 20, 2014. (Photo by Ints Kalnins/Reuters)

Eda Veeroja whisks her son Vahur with birch twigs at their smoke sauna in Mooska farm, near the village of Haanja December 20, 2014. (Photo by Ints Kalnins/Reuters)

Vahur Veeroja takes a dip in cold water pool before entering the smoke sauna at Mooska farm, near the village of Haanja December 20, 2014. (Photo by Ints Kalnins/Reuters)