Nature is always a good source of sketch subjects. Here's a drawing obviously called Tree1:
If you rent a Vespa scooter from Jet City Scooters and ride it over the Magnolia bridge, you can find this very tree located outside a school building up in that Seattle neighborhood. Jet City Scooters will deliver the rented scooter directly to you anywhere in the greater Seattle area. Then they'll pick it up when you're done with the rental period. Finally, scooter rentals for the rest of us! Right here in Seattle.
Let me know if you need more specific directions... I could look up the address and get a MapPoint map of this tree's exact location... but I'm too lazy to do that now. Maybe next time I'll be more ambitious. More likely not.