Photo of Alp Weissenstein by drone from 15.07.2017 (Thomas Widmer). View of all the alp buildings and the land improved plain behind the buildings.

Photo of Alp Weissenstein by drone from 15.07.2017 (Thomas Widmer). Alp house built in 1874.

Photo of Alp Weissenstein by drone from 15.07.2017 (Thomas Widmer). View of the Alp in the direction of the Albula Pass with the buildings and land improved plain, as well as the artificial lakes which gave the alp the name Alp Weissenstein (Crap Alv).

Photo of Alp Weissenstein by drone from 15.07.2017 (Thomas Widmer). View of the alp buildings from the Albula side with view of the Piz Ela.

Flower meadow in the foreground with the Alp building (1874) and the cheese dairy which was built in 1860 as a brickworks, at 2000 metres above sea level (photo taken on 15.07.2017 / Malgorzata Sitnik).

Barn (1970) for cows and cattle with experiment facilities (photo taken on 15.07.2017 / Malgorzata Sitnik).

Barn (1970) for cows and cattle with experiment facilities (photo taken on 15.07.2017 / Malgorzata Sitnik).

Barn (1970) with flexible facilites added in 2015, in particular for experiments (photo taken on 15.07.2017 / Malgorzata Sitnik).

Summer barn (built around 1860 and extended and renovated several times) for cows, cattle or sheep (photo taken on 15.07.2017 / Malgorzata Sitnik).

Residential building (1874) with entrance and annex for the dirt trap and the communications room built in 2015 (photo taken on 15.07.2017 / Malgorzata Sitnik).

Residential house (1874): dining room which was formerly the lounge (photo taken on 15.07.2017 / Malgorzata Sitnik).

Residential house (1874): the office, renovated in 2015 (photo taken on 15.07.2017 / Malgorzata Sitnik).

Residential building (1874): Double bedroom which was reonvated in 2015 for sound insulation and protection from the rays of the electric power line (photo taken on 15.07.2017 / Malgorzata Sitnik).

Residential building (1874): Attic which is occasionally used for sleeping during student excursions (photo taken on 15.07.2017 / Malgorzata Sitnik).

Alp Weissenstein: Cow herd ruminating (photo taken on 15.07.2017 / Malgorzata Sitnik).

Alp Weissenstein: Cow with buildings in the background and the Albula waters (Alvra) which originate from the alp (photo taken on 15.07.2017 / Malgorzata Sitnik).

Alp Weissenstein: Cow with alp buildings and the Albula waters (Alvra) (photo taken on 15.07.2017 / Malgorzata Sitnik).

Alp Weissenstein: Cow with buildings in the background and the Albula waters (Alvra) which originate from the alp (photo taken on 15.07.2017 / Malgorzata Sitnik).

Alp Weissenstein: Alpine herdsman with his animals (photo taken on 15.07.2017 / Malgorzata Sitnik).

Alp Weissenstein: Alpine herdsman with cow (photo taken on 15.07.2017 / Malgorzata Sitnik).

Alp Weissenstein: Horses enjoying the summer on the mosquito free alp (photo taken on 15.07.2017 / Malgorzata Sitnik).