You can park on any street nearby.
Cache is in a nice local park called Tilden Woods Stream Valley Park.
In the spring, you will be rewarded by blooming daffodils.
You are looking for a bottle that resembles multi-vitamines container.
Coordinates were updated per log entries to be more accurate. (N 39° 03.120' W 077° 08.295')
If you are curious about the name, it is named after a 2003 movie made in the Czech republic. (nominated for Oscar in USA (best foreign language film; won award in Bankok film festival). Zelary is a name of a vilage where the movie takes place.