A few kilometres before Vidin, at the Serbia-Bulgaria border, turn off the main route and cycle the short distance to the Visocko brdo wine region and the wine-producing villages of Rogljevo and Rajacke. Wines have been made here since Roman times, but the wine trade exploded at the beginning of the 20th-century when phylloxera decimated the French wine industry, allowing the region to export its wines throughout Eastern Europe. Visocko brdo’s remaining 270 semi-buried wine cellars are true architectural wonders.