With the eruption of Mount Vesuvius in 79 AD, Herculaneum was completely buried under a thick layer of lava and mud. The lava layer was so thick that even the coastline moved several kilometers. Most people could escape, but in the old port more than 300 victims were found.
Currently, about one third of the entire site is exposed. It is much smaller than Pompeii, but some of the houses are better preserved, and a large collection of bronze statues was found.
Given the fact it was discovered much later, it attracts much less visitors than Pompei.
Herculaneum (Ercolano) is located only 15 km from Naples and is quite easy to visit. It is especially popular with true history lovers. The archaeological site is smaller than Pompeii and a visit takes 2-3 hours.
Popular ports for an excursion to Herculaneum are: