Visit the summer home of John Charles Linthicum, the man who introduced the bill to establish the Star Spangled Banner as the National Anthem in 1931. This quick Park & Grab is located in the middle of muggle territory so use discretion as you search. Don't worry about trespassing, you'll be in my front yard and I'll say hi if I see you! However, the cache is hidden in relative plain view. Side street parking is available.
Congrats to Big315Red for the next-day FTF!