Landmark, Carrbridge, RSPB
To make the most of these attractions you'll probably require two days.
Take the A939 south from Nairn. At Ferness turn right onto the B9007 and follow the road across the moor. Turn right onto the A938 which brings you to Carrbridge. The ancient Bridge over the River Carr was build to take packhorses across and is the oldest stone bridge in the Highlands - although it's not used these days. There are viewing platforms and you should be able to get some good photos of the raging waters and the bridge. Driving time from Nairn around 30-40mins.
Landmark Forest Theme Park. An outdoor adventure centre in the middle of a forest. A great day out for all the family. You can spend the whole day there if you wish. Restaurants and cafes on site. If you feel like taking a different route back to Nairn head past the old bridge and follow the road to the A9. Head north to Inverness and then right onto the A96. If you turn right out of Landmark you can head for Aviemore or back through Grantown past the Speyside Heather Centre.
3) RSPB - Boat of Garten
If you have time today or wish to spend longer another day drive on to Boat of Garten and then follow the signs to the Osprey Centre at Loch Garten. Well worth a visit during May-July if you want to see young Osprey chicks. Details on Boat of Garten ospreys here or see the Live web cam during nesting season. When there are no Ospreys, if a quiet walk in a lovely wooded Pine forest appeals then look no further. There's lots of wildlife to look our for including red squirrels. Further details on RSPB opening times and entry.