221B Baker Street in London is significant to Sherlock Holmes (2009) because it is the residence of Holmes and Watson in the movie. I found this information through the Sherlock Holmes Museum's official website, which is a museum website and primary source for the recreation of Holmes's residence. This website is an example of low barriers to entry because the website gives valuable information about the museum and recreates Holmes's fictional home, allowing fans to experience the setting through exhibits, Victorian furniture, memorabilia, and guided visits which you can book through the website. Mapping this location on a COVE map allows us students be able to see all these locations for all of us to gain a deeper understanding of the film.
References
Website: https://www.sherlock-holmes.co.uk/about-the-museum/
Image: https://thirdeyetraveller.com/221b-baker-street-london-sherlock-holmes/