Tunisia has no shortage of Roman ruins but Bulla Regia near Tabarka is one if the country’s most interesting and intriguing sites. Here, the Roman inhabitants coped with the harsh summer climates by ingeniously building their villas underground, which has left the cities’ houses incredibly well preserved today. For history lovers, this is a unique opportunity to walk through actual Roman houses, with their walls still intact. It’s a glimpse of the residential life of the ancient world that you often don’t see.