Reinbach Falls in Meiringen Switzerland is significant to the film Sherlock Holmes(2009) because it shows how much inspiration the adaptation took from the original story. At Reinbach falls, Sherlock has to put his skills to the test in a fight against the antagonist of the story Doyle, where in the end they both end up falling from the cliff. Similarly, the fight against Blackwood ends in a battle of skill where one of the characters falls to their death. Though it plays out differently and different chracters, the adaptation took much inspiration from this story. I found this information from a fan wiki called "The Adventure of the Final Problem" on fandom. This source is an example of low barriers to entry because anyone can create an account and add onto what has already been typed. Mapping this location on COVE adds a grassroots layer to the story as it shows us where the adpatation got a lot of its inspiration from and how they built upon it.
Research: https://bakerstreet.fandom.com/wiki/The_Adventure_of_the_Final_Problem
Image: https://www.world-of-waterfalls.com/waterfalls/europe-reichenbach-falls/