"In 4 B.C.E., the only residents of Saumur were troglodytes, or people who lived in limestone caves that formed over 90 million years ago. Experience their ancient lifestyle for yourself at La Demeure de la Vignole, a hotel that occupies a former troglodyte village on a hillside in the Loire Valley. Here, four of the 11 rooms are actually in the caves, while the other seven are housed in a 17th-century, Tuscan-style mansion overlooking the valley. Guests can also look forward to a heated pool in the caves, as well as friendly, accommodating staff who are happy to help arrange trips to nearby Fontevraud Abbey and Château de Saumur."