The Grisset Tower is an astonishing vestige of the Gallo-Roman era. This ancient tower was once part of a temple dedicated to Mercury, the god of travelers and commerce. You can marvel at the impressive stonework and vaulted ceiling, which have survived almost two thousand years. The tower is located on a hill overlooking the Loir, and you can enjoy panoramic views of the green valley and charming villages. The hike is easy and pleasant, but be sure to wear good shoes and bring water and snacks. You can also explore the ruins of a bath complex and other buildings that belonged to a small Roman town. The Tour de Grisset is a hidden gem that will take you back in time and bring you closer to nature.