Inverness is small, about 48,000 people, and became a city only in 2000, but it has been the capital of the Highlands for much longer. It sits where the River Ness runs out of the Great Glen into the Moray Firth, the natural crossroads of the north, and everything that shaped the Highlands happened within a few miles of it: the Pictish kings, Saint Columba's mission, the end of the Jacobite cause at Culloden in 1746, and the canal that Thomas Telford cut through the glen.
It isn't a city of great monuments. Its pleasures are the river walk at dusk, a bookshop in an old church, a session in a pub, and a day out in every direction: Loch Ness to the south-west, the battlefield to the east, the dolphins of the Black Isle to the north. Five days lets you see all three and still have time for the city.
This plan keeps each day simple. Day one is the city and the river, day two Culloden, the Clava Cairns and Fort George, day three Loch Ness and Urquhart Castle, day four the Black Isle, and day five the Caledonian Canal and a farewell night. It starts on a Tuesday, because the museum and Leakey's Bookshop are closed on Sundays and Mondays, and the buses to Culloden and Fort George don't run on Sundays. For the bigger picture, see our page on the United Kingdom.