Re Trip to Scotland
Scotland has some nice scenery and lots of history. The view from the top of Schiehallion (The Fairy Mountain) is quite nice. Its a an reasonably easy climb, lots of boulders at the top to give it a 'real' mountain feel. On a nice sunny day makes a great backdrop for a 'tourist' picture as you can see right across the whole of Scotland.
The 'Queens View of Loch Tummel' is quite nice, with Schiehallion in the background. (Actually the whole area Glen Lyon, Loch Earn and Loch Tay is quite nice, typical Perthshire Scenery)
As is Glen Affric - The Land that time forgot but with no dinosaurs except for the one at Loch Ness (A bit out of the way but worth a visit if you go Nessie Monster Hunting at Loch Ness)
Glencoe can be a little more rugged and brooding viewed here with some more typical weather.
As for Castles, if you like that kind of thing, the Eileen Donnan castle is very picturesque. Some other notable castles would be Edinburgh Castle and Princess Street Gardens, Stirling Castle, Scone Palace outside Perth,
Glamis Castle in Angus.
There actually to is many to list.
If you like Golf you'll think you have died and gone to heaven as the Open Championship is being held at
Carnoustie Championship Golf Course during mid July. St Andrews is not to far away either. North of Edinburgh we have the equivalent of the San Fransisco Golden Gate Bridge called the Forth Railway Bridge. The Equivalent of the Eiffel Tower in Paris but a bit more useful.
As for searching for mythical creatures, Loch Ness is worth a visit, but stay away from Ben Macdui as it is haunted by a Big Grey Man!!.
If you need any specific info there are a few Scottish members on the Forum who can answer any of your questions.