Carnuntum is Austria’s largest archaeological site. The majority of this former Roman Danube conurbation lay undisturbed for 1,500 years. Archaeologists have been excavating the site for over 100 years, yet to this day, less than 1 percent of the city has been uncovered. Carnuntum was a major Roman city erected as a winter camp by Tiberius, in 6 AD. It became one of the Roman Empire’s most important cities. Today, visitors can see replicas of the ancient buildings, which have been created in intricate detail. Guides tell entertaining stories about the city inhabitants and there is a programme of events designed to recapture the glory of this city. Archaeologists will recreate more of the ancient city over the next four years and will include flower gardens recreated using traditional Roman methods.  High-tech animation will enable visitors to wander through the parts of the city, which still lies underground. Tours include 'Journeys back in time' and 'Tales with Julius Carnuntinus.'

Marvel over the natural wonder of Europe’s largest underground lake, the Seegrotte, which lies 17 kilometres to the south of Vienna in Hinterbrühl. This awesome phenomenon was caused in 1912, when an underground explosion at the gypsum mine in Hinterbrühl went wrong triggering a flood of 20 million litres of water. The lower part of the mine was completely submersed beneath the subterranean lake. The mine lay dormant until the 1930s when a group of cave explorers rediscovered the Blue Lake, which by now covered a surface area of 300 metres square with a depth of around three metres. An even bigger part of the lake lies 14 metres below the Blue Lake. The mine was opened to the public and is now one of Austria’s best tourist attractions with around 250,000 visitors a year. Seegrotte tours now encompass displays of miners removing gypsum using a sledge and iron, a visit to the Barbara-Chapell, built in 1864 to honour miners who died or been injured during their work there. Every four years there is a celebration here to St Barbara, patron saint of the mine. A senior priest holds Mass in remeberance of the miners and the Vienna Boys Choir sing.