school and several vocational schools. Though the river Danube is very polluted by international standards, many people still fish in it. Before the power plant was built, sturgeon caviar from this area was very popular and was exported as a delicacy to the western Europe and the United States. In the 1960s, up to 3 tons of caviar yearly was exported from Kladovo. Record catch from that period is a heavy sturgeon with of the roe in it. However, the records from the past, dated in 1793, report of the sturgeon which had . The specificity of the Caviar of Kladovo was that the roe gets "ripe" enough during the long journey of the fish from the Black Sea upstream the Danube. Also, roe was turned into the caviar using the dry method. The nearby archeological sites include the remnants of Roman Emperor Trajan's bridge, a Trajan table, remnants of Trajan's road through the Danube's Iron Gates, and the Roman fortress Diana. The Trajan's Bridge is located 5 km downstream from Kladovo. It had 20 pillars and was 1,200 m long. Trajan's successor Hadrian partially demolished it to prevent the raids of the Dacians and the bridge was later neglected. The bridge is depicted in a relief on the Trajan's Column in Rome. Until the 16th century, it was the largest bridge ever built. The 20 pillars were still visible in 1856, when the level of the Danube hit a record low. In 1906, the Commission of the Danube decided to destroy two of the pillars that were obstructing navigation. In 1932, there were 16 pillars remaining underwater, but in 1982 only 12 were mapped by archaeologists; the other four had probably been swept away by water. Only the entrance pillars are now visible on either bank of the Danube. When the artificial Đerdap Lake was formed from 1967-72 as a result of the Iron Gate I Hydroelectric Power Station. The lake inundated the old Roman road along the coast and the only remaining part of the old path is the Tabula Traiana, a Roman memorial plaque, which was elevated for 25 m. The process of lifting the table (4 m x 1.75 m) lasted from 1966 to 1969, today is several meters above the lake level and is observable only from the lake. Remains of the fortress Diana are located 2 km downstream of the Iron Gate I. Diana