11Mar Bougainvillea at Keyhole Rock 8×10 OIL Posted in Uncategorized Posted on March 11, 2010 Tags: alla prima, bougainvillea, coastal scene, keyhole rock, Laguna Beach, Montage Resort, plein air painting, treasure island Plein air painting at Montage Resort Laguna Beach. Keyhole rock is at Treasure Island Park in Laguna which is in front of the resort there. SOLD Share: By admin