Located on the north-west corner of the Khadir Island, lies the ancient city of Dholavira. It was discovered from under mounds of earth in the year 1967. These excavation sites are one of the largest Harappan sites in India, a part of the Indus valley civilization and are believed to be more than 5,000 years old. The excavations have revealed many ancient artifacts, like seals, beads, animal bones, gold, silver, terracotta ornaments and vessels. Some of these items are linked to Mesopotamia, which proves that it was a major port and trading center of those times. The most fascinating discovery of Dholavira is the large inscription, comprising of ten letters in the Indus script. Each letter has been engraved on slices of crystalline material.