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1600-year-old roman mosaic floor you can walk over

Matt Cardy / Getty Images

David Rawcliffe, the house and monument steward at the National Trust's Chedworth Roman Villa, cleans a Roman mosiac in the new environmentally-controlled conservation shelter on March 19, 2012 near Cirencester, England. More of the 1600-year-old Roman floors will be uncovered over the coming year.

Matt Cardy / Getty Images

David Rawcliffe, the house and monument steward at the National Trust's Chedworth Roman Villa, inspects part of a Roman mosiac in the bath house preserved in the new environmentally-controlled conservation shelter on March 19, 2012 near Cirencester, England. Opened this month, the multi-million pound building allows visitors to walk on suspended walkways just above the 1600-year-old Roman floors and to see recently excavated mosaics not seen for 150 years, with more to be uncovered over the coming year.

 More about the Chedworth Roman Villa and the mosaic floors.