At the modern settlement of Hersonissos is the site of the ancient town of Chersonesos, an important seaport from Classical Greece through Byzantine times that served the city of Lyttos. The contemporaneous pleasure port is built over the remains of the Roman port. Some traces of those remains, most of them submerged, are still visible in some places. On the seaside street there is a pyramidal Roman fountain with mosaics of fishing scenes. On the top of the rocky hill behind the port stand the ruins of an early Christian basilica with floor mosaics.
The vicinity of Hersonissos is noted for its prehistoric archaeological finds. On the coast approximately one kilometer to the east of Hersonissos was an ancient temple dedicated to the goddess Britomartis.