Compromise can make your holiday bearable at worst, at best it can be a triumph; so if you're into fishing and your other half isn't, this might be right up your street. The area of Planinsko Polje (Planinsko Plain), about 12km from Postojna, is officially a 'landscape park', meaning it's set up for visitors, and of course beautiful. The large flat plain forms part of the river system that leads to Ljubljana, and after heavy rain transforms into a lake, then leading to the River Unica. This happens to be a fly fishing hotspot, with some of the best grayling and brown trout in Europe. Meanwhile, your other half could be discovering the other attraction of this area, Planinska Cave, on the southern edge of the plain. Yes, there are more stalactites and stalagmites to be explored; this less crowded destination offering underground tours on foot or by boat, passing by numerous subterranean lakes and waterways. Near the caves are a couple of ruined castles: the aptly named Mali Grad (small castle), built to guard the Ljubljana - coast route, its imposing tower containing a Gothic chapel; and the partially restored Haasberg castle, above the River Unica gorge. Finish the day with a beer and fish dinner at Gostilna Petkovšek; sure to be no arguments there!