About 10 miles outside of Cruden Bay en route to Peterhead is a small town called Boddam which has a very neat lighthouse. Interestingly, there is a private enterprise that bought the island which the lighthouse resides on and now offers two cottages attached to the lighthouse as daily rentals. I stayed there recently and really enjoyed it. I was told - although I can't confirm - that Boddam Lighthouse is the eastern-most point in all of the UK.