Did Archimedes build a death ray?

During the siege of Syracuse in 214 BCE, the city-state's resident genius, Archimedes, built a number of clever war machines to thwart the invading Roman fleet. One invention, the death ray, has been considered the stuff of legend. But could it have been real?

Some cities like Paris, Rome and Budapest are well-known for the catacombs carved beneath. Another city, Nottingham, home of Robin Hood, is less famous for its system of caves, though its been getting its due lately. There are about 500 man made caves beneath the town, dating back at least as far as the Medieval period.