I visited this WHS in August 2013. I drove from Tuscany and slept over in Tarquinia to be able to visit the painted Etruscan tombs at 08:30. What a marvel! There are 16 painted tombs open to the public. The painted tombs are kept at a constant temperature and a controlled environment which means that you can only see them from behind a glass door. Still, photography is allowed and with a lot of patience, time and a good zoom lens you can enjoy the site and take great photos. I was the only soul around at 08:30 which meant that I had the tombs for myself till around 09:45! The beauty of these painted tombs is comparable to that of the Valley of the Kings in Egypt. I also visited the Etruscan Museum in Tarquinia which houses several Etruscan artefacts, vases, jewellery and coins found inside the painted tombs, the famous winged horses, and also whole painted tomb walls !!! So it definitely shouldn't be missed!