This is in Louisa Boren Overlook park, which is named after one
of the original settlers of Seattle. She married David Denny (King
County's first marriage). The ceremony was conducted by the
county's first Justice of the Peace (David Maynard). Louisa was
known as the "Sweet Briar Bride" for her garden (the first in
Seattle) - now the site of the Seattle Center. On your way to the
cache, look for this view of the Dawg House - Husky Stadium. Bring
your own writing implement. Don't fall down the hill! :)
Signature FTF certificate #3! (1 and 2
weren't numbered, oops.)

See - there it is!