Palazzo dei Rondanti, a Renaissance-style building built in the 16th century located in the historic center of Porto Ercole: it was the residence of the Spanish rulers.
Fattoria di Terrarossa, a historic 17th-century rural complex built by the Spaniards in the homonymous village in the north-eastern part of the promontory. It is home to a hotel complex.
Villa Italiesin, built at Poggio Pertuso in Porto Ercole in 1960 on a project by Christian Norberg-Schulz.
Villa Valdroni, built at Poggio Pertuso in Porto Ercole between 1968 and 1970, designed by Oreste Martelli Castaldi.
Villa Ricci, in Cala Piccola in Porto Ercole, built according to a project by the architect Julio Garcia Lafuente in 1977.
Villa Rebecchini, in the locality of Casacce in Porto Ercole, built according to a project by the architect Julio Garcia Lafuente in 1977.
Villa La Giocondiana, called Villa Viti, built in Porto Santo Stefano in the twenties of the twentieth century by the architect Giovanni Maria Viti, one of the few period residences left unharmed in the bombings of 1944.
