THIS CACHE IS NOT AT THE POSTED COORDINATES! DO NOT GO THERE UNLESS YOU WANT TO CLIMB DOWN A ROCK!
In order to get them and a hint, complete the "Telegraph Hill" adventure lab. After completing each location, you will either get a number that's part of the answer, which you should plug into the formula below, or a spolier to the actual cache. To optimize for the bonus cache, I recommend you start at Filbert Street Steps and then do the stages by the tower.
N37 48.AB(C+1), W122 24.CDB