In case you want to visit, you need to go to Küssnacht am Rigi. Krähbüel to be exact. Note that it is the town with the two "s" and the one close to the Hohle Gasse mentioned in Wilhelm Tell. There is also Küsnacht with a single "s", which is in the Canton of Zurich and about an hour's drive away from the true Küssnacht.
You can use any parking in front of Krähbüel 2 and 4 or in the Krähbüel street itself. Note that Krähbüel 2 and 4 are actually located at Bergweg, so your GPS might fail you. So, you might use latitude/longitude 47.07644620 / 8.44200880.