Portavadie, Argyll
Portavadie, on the banks of Loch Fyne on the west coast of Scotland, was originally earmarked as an oil rig, but plans fell through. Today it is a marina with holiday homes, a restaurant and bar, a gift shop, and a leisure centre with what is believed to be the biggest heated outdoor infinity pool in Scotland. There are also outdoor spa pools and a sauna, an indoor pool and a gym; treatments such as massages and facials are available. The facilities are powered by a woodchip biomass generator, and have views across the loch and over to the Isle of Arran.
£14 for a 90-minute swim, sauna and hot tub
