Locanda di San Martino

The attraction of this Sasso Caveoso hotel is its subterannean termae romanae (Roman baths). Cave accommodation, with niches and rustic brick floors, is set around cobbled paths and courtyards. Featuring a tepidarium (warm pool) and caldarium (steam bath) like classical Roman baths, the spa is open only to adults, and costs €20 for hotel guests and €25 for others.