From Marcialla going down to Certaldo, after Tavolese you find a ruining church once the Delubro of S. Michele Arcangelo in a place called Nebbiano.
The ruined Church is sourrounded by amazing countryside:
The Castle of Santa Maria Novella
A view until the towers of San Gimignano:
The ruins of the castle of Pogni (you can admire the remaining Tower ):
The San Donnino Chapel: