The main page serves as a directory of links to other .onion sites. This is part of increased surveillance of user activity happening within Web 2.0 sites. The area is home to hundreds of historical sites and attractions. Others display artifacts found in archaeological sites inside buildings. Users leave digital imprints during browsing of social networking sites or services. The area of distribution of these sites has however changed. IAEA requested access to additional information and access to two nuclear waste sites at Yongbyon. Several sites and individuals publish electoral predictions. New Delhi is home to several historic sites and museums. Its efficacies at the other receptor binding sites are unclear. These are very festive gatherings with lots of spectacles attending the sites. Massachusetts is home to a large number of museums and historical sites. This initially restricted connections to military sites and universities. Arizona is home to one of the most well-preserved meteorite impact sites in the world. There are seven UNESCO World Heritage Sites on Sicily.