The country’s coastline is one of the shortest in Europe, but it packs a punch with unspoilt nature reserves, vibrant Venetian towns and a thriving foodie scene I’m riding a salt-coloured horse through the Dragonja valley, deep in the green hills of Slovenian Istria. Electric-blue dragonflies zip over the river as we gallop past olive trees and vineyards. The landscape rises steeply in a series of grassy terraces, and at the top of the hill we rein in the sweating horses to take in t