Glasgow
The history of Glasgow is largely based around it's shipbuilding and trading industries. As such some of the architecture of the old merchant buildings is worth a look.
Glasgow is a vibrant city with many new buildings going up and a large university population. It is home to some great festivals including Celtic Connections and World Piping Championships.
Walk along the River Clyde in the city to see an ever changing landscape.
It has 2 large railway stations, Central and Queen Street which will give you easy access to most of Scotland.
Within a short distance you can visit the Loch Lomond and Trossachs National Park. If you are fit enough i’d recommend a trip up Ben Lomond to get great views of the loch. Watch for the weather though and wear the correct gear to suit.