What can you give your country for its 70th anniversary? For thousands of school pupils and volunteers, the answer is the sweat of their brows as they worked to prepare a new public 70-kilometer (43-mile) walking path called the Sanhedrin Trail. As a byproduct of their backbreaking work, they also stumbled upon a priceless 1,400-year-old intact oil lamp engraved with an eight-armed menorah, remains of important glass industry, and an extremely rare gold coin from Suleiman the Magnificent.