Few people would choose Luni Mare for Luni Mare's sake. The local area is not particularly exciting.
What is interesting though is that it is only 1 km to the sandy beaches of Marinella di Sarzana and Fiumaretta - long sandy beaches overlooking the Marble Mountains in the background, the Tuscan coast to the southeast and beautiful Monte Marcello in Liguria in the northwest. In addition, within easy reach of both Pisa and Lucca (both approx. 55km). It is also within easy reach of the Cinque Terre, either by boat sailing from Lerici / Portovenere or you can drive to La Spezia / Sarzana and take the train from there (only approx. 15 minutes by train from La Spezia).
Read more about Luni Mare
The port area of Luni was in Roman times particularly known for its export of marble and stone from the Apuane Alps. However after attacks of malaria, and attacks on its harbour, the population was effected and it lost its heyday. In the year 1058, the last of the towns inhabitants relocated to the neighbouring town of Sarzana. Nowadays, the port is no more and the shore has shifted over the years with the effects of landslides.
Today you can some of the remains of Luni in the form of the old amphitheatre, which is now used for outdoor concerts in the summer. Near the amphitheater is an archaeological museum where you can see ancient relics such as statues, vases, oil lamps, coins, etc. The museum can be found on Via San Pero 39.