The Reichenbach Falls are a series of waterfalls on the Reichenbach stream in the Bernese Oberland region of Switzerland. They have a total drop of 250 metres (820 ft). At 90 metres (300 ft), the Upper Reichenbach Falls is one of the highest cataracts in the Alps. Today, a hydro-electric power company harnesses the flow of the Reichenbach Falls during certain times of year, reducing its flow. In popular literature, Sir Arthur Conan Doyle gave the falls as the location of the final confrontation of his hero Sherlock Holmes with his greatest foe, the criminal Professor Moriarty in “The Final Problem”. The falls are located in the lower part of the Reichenbachtal valley, on the Reichenbach stream, a tributary of the Aar river. They are some 2 km (1.2 mi) south of the town of Meiringen, and 25 km (16 mi) east of Interlaken. Politically, the falls are within the municipality of Schattenhalb in the canton of Bern. The falls are made accessible by the Reichenbachfall funicular. The lower station is some 20 minutes walk, or a 6 minute bus ride, from Meiringen station on the Brünig railway line that links Interlaken and Lucerne.