London Bridge is a famous bridge that spans the River Thames in London, England. It connects the City of London with Southwark and has a rich history dating back to Roman times. The current bridge, completed in 1973, is a simple, modern structure made of concrete and steel, replacing several older versions that have stood in its place over the centuries. One of the most interesting stories about London Bridge is that the previous bridge, built in the 19th century, was sold to an American entrepreneur in the 1960s. He transported it to Lake Havasu City in Arizona, where it still stands today as a popular tourist attraction.