LONDON (Reuters) - Only one of the ancient wonders of the world still survives -- now history lovers are being invited to choose a new list of seven. Among 21 locations shortlisted for the worldwide vote is Stonehenge, the only British landmark selected. The 5,000-year-old stones on Salisbury Plain, Wiltshire, will be up against sites including the Acropolis in Athens; the Statue of Liberty in New York; and the last remaining original wonder, the Pyramids of Giza in Cairo.