The Reichenbach Falls (German: Reichenbachfälle) are a waterfall cascade of seven steps on the stream called Rychenbach in the Bernese Oberland region of Switzerland.
[4][1] The town and the falls are known worldwide as the setting for a fictional event: it is the location where Sir Arthur Conan Doyle's hero, Sherlock Holmes, fights to the death with Professor Moriarty, at the end of "The Final Problem", first published in 1893.
Sir Henry's grandson, Peter Lunn, recalled, "My grandfather said 'Push him over the Reichenbach Falls' and Conan Doyle hadn’t heard of them, so he showed them to him."
The ledge is marked by a plaque as illustrated here; the English inscription reads: "At this fearful place, Sherlock Holmes vanquished Professor Moriarty, on 4 May 1891."
The Granada adaptation of The Final Problem, with David Burke as Dr Watson and Eric Porter as Professor Moriarty, was filmed at the real Reichenbach Falls.
Reichenbach Falls was also the title of a 2008 BBC Four TV drama by James Mavor, based on an idea by Ian Rankin and set in Edinburgh.