Oban is a small harbour town in the Firth of Lorn. It is only a 3-hour car drive away from Edinburgh. There are a few things to see there (the Oban Distillery, old castle ruins, McCaig’s Tower) but for me the most impressive part of the visit to Oban was the view from the hill, when approaching the town on A85.
The horseshoe shaped bay is very beautiful.
You could come on a one-day trip, have a walk around, have a meal in one of the seafood restaurants and go back home. If you have more time to spare, you can go kayaking, hillwalking or cycling, or take one of the boat trips to watch seals and visit Fingal’s Cave in Staffa.