The Russian crown prince Alexander visited Langinkoski for the first time in 1880 with his consort, the Danish Princess Dagmar, who became Maria Feodorovna following their marriage. After ascending to the Russian imperial throne, Alexander III visited Langinkoski again. He was infatuated with the place and expressed a wish that a fishing lodge be built for him at Langinkoski Rapids.

The Emperor's wish came true. Architect Magnus Schjerfbeck prepared the drawings of the fishing lodge, and architect Johan Jacob Ahrenberg was in charge of interior design. Compared to the imperial court, the lodge was simple and intended for summer use only. Langinkoski was the Emperor's refuge, where he withdrew from the luxury and formalities of the court. The interior and items in the lodge offered Finnish applied arts and industry an opportunity to present their products. The textiles were made by Tampella, the dishes by Arabia, and the glasses were blown at the local Karhula glassworks.

The fishing lodge was inaugurated in a grand ceremony on 15 July 1889. Local residents brought flowers and sang. When the Emperor came onto the veranda, a 30-gun salute was fired. In the evening, a banquet was held on the imperial yacht, during which the Emperor raised his glass to toast Finland. The imperial family enjoyed great popularity in Finland.

Alexander visited Langinkoski almost annually. He liked to spend time in the countryside. The river bed was equipped with steel nets and bars to prevent salmon released into it from escaping so that the Emperor could catch them. The Empress, who was known as a sweet and gentle person, sometimes wanted to prepare lunch herself. In the evenings, there were meals, bonfires, firework displays, music and salutes, and sometimes trips were made with horses. The Emperor had three professional fishermen. They came to Langinkoski in May every year and returned home to the Tver government after the fishing season.

Alexander and his family visited Langinkoski for the last time on 21 and 22 July 1894. After returning home, the Emperor learnt that he had nephritis. He did not recover from the disease, but died at the end of the same year. A memorial stone was erected at Langinkoski to remember the Emperor.

After Alexander's death, his son took the throne as Nicholas II. He did not like to spend time at Langinkoski. People at Langinkoski looked forward to a visit by the imperial family, but the last Emperor of Russia stopped by only once, in September 1906. From time to time, the fishing lodge was visited by other members of the imperial family or high officials.

During the First World War, the fishing lodge served as a convalescent home for wounded Russian soldiers as the dowager Empress had suggested. Russians also built a base at Langinkoski, with trenches, firing nests and dugouts. Some trenches are still to be seen, but the other structures have disappeared over the years.

By public transport to Langinkoski