One of my favorite places to visit along the Oregon Coast is the Heceta Head Lighthouse smack between Florence to the south and Yachats to the north.
There is easy parking along the sandy beach cove and a light trail through the trees.
There's even a nifty Bed and Breakfast if you want to hangout longer and watch the ocean from the front porch. (Oh, and it's haunted. You've been warned!)
From this little basecamp there are so many hikes and trails to wander around and become totally lost... which is kind of the point, isn't it?