The mystery of Russia's famed Amber Room, seized as the spoils of war by the Nazis, has puzzled historians and experts since it disappeared in 1945.

Sergei Trifonov, however, believes he has solved the riddle, and that the treasure -- ornately carved panels of glowing amber, formed from fossilized resin -- lies underneath a bunker in the Russian enclave of Kaliningrad.

To test his theory, Trifonov has begun to probe the soil under the bunker using a ground-penetrating radar, and pump out water. He has already unearthed a brick-lined room.