The reconstructed Hochdorf Tumulus, Baden-Württemberg, Germany
The Heritage Trust
When the  550bce Hochdorf Tumulus was discovered in 1978 in Baden-Württemberg, Germany, it had been almost completely ploughed out except for a slight elevation in the ground. After its reconstruction in 1987 the mound now measures 60m (200ft) in diameter, is 6m (20ft) tall, and with a volume of 7,000 cubic metres (9,200 cubic yards) of earth and 280 tons of stone, is once again an imposing landmark in the surrounding countryside.
More here.