This cache is near a cafe that was known for a long time by many Poolesville High School students as Cafe 107. Since I graduated, it changed ownership and no longer goes by that name. However, at GZ you will find a relic from times past. If you're a PHS grad yourself, you may recall many lunch periods spent here at this cafe.
You are looking for a nano, that is NOT magnetic because it appears that the bus shelter is constructed entirely of aluminum. BYOP, use stealth and return as found.