Only a thirty minute train ride from Sorrento lies one of the most famous archeological sites in the world.
The thriving resort town of Pompeii was completly smothered by ash and lava in 79AD after the massive explosion of the volcano Vesuvius, which looms above the town. For centuries, nothing was known about the existence of these remains, until a renewed interest in antiquity led to the first artifacts being dug up in the eighteenth century. It was only in the nineteenth century, however, that digging began in earnest, and by the early twenties of the last century the site was already a major tourist attraction. Today the digs are at the center of a big operation involving hundreds of people, from custodians, to souvenir stands, hotel staff, and more. The revenue produced by all this could not come from anywhere else in this economically underdeveloped region.
Reaching the site is simple: it's just a few minutes walk from the train station, or just off the highway going to Naples and Salerno. The ticket office is located at the Porta Marina,on the other side of the main tourist area. An adult ticket costs 10 euros. Credit cards and travellers cheques are not accepted, but there is an ATM right by the gates.
As interesting as the ruins are,this can be a very tiring excursion. Temperatures can be extremly high as early as May, and there is hardly any shade once inside. Bottled mineral water, sold everywhere, is a must. You should allow at least two hours around the site; twice that if you care to see the entire area at a reasonable pace.
It is worth considering hiring out a guide for the visit. Travel agencies along the Sorrentine peninsula can arrange one, otherwise you can hire one right at the dig itself.
Surprisingly, there are very few places where you can eat, and, not so surprisingly, they tend to serve tourist-type food. It's probably better to wait until you get somewhere else, but if you want a full meal, the Hotel Vittoria, on the main square right in front of the site, is your best bet. They usually offer some kind of fixed price menu for 12-16 euros, and have a cafeteria type restaurant as well.
Remember to buy one of the books on Pompeii with the plastic overleafs showing you how things were and how they are now.
If you are really interested in antiquity,it's definitly worth considering a trip to the Museo Capodimonte in Naples, where many artifacts taken from the dig are on display.