"Many of the Loire Valley’s elegant châteaux were constructed with limestone extracted from the region’s famous troglodyte caves. Some of those caves were historically used as private dwellings or wine cellars, and a particularly large one, located on the banks of the Loire River in Rochecorbon, was home to a monastery. It’s since been transformed into Hotel Les Hautes Roches, the first luxury hotel of its kind in France, with pretty landscaped gardens framing an outdoor pool on the riverfront and low-lit, atmospheric passageways leading through the renovated cave inside." - Tablet Hotels