chuck holton. >> reporter: ark of the covenant built by mos to hold the tablets at the command of god himself. secreted in the darkness of the holy of holies for centuries. then it disappeared. for more than 2,000 years the where abouts have been shrouded in mystery. many theories as to the where abouts. some say buried under the temple mount. others contend carried to egypt before being lost to history. wherer it maybe, the lost ark of the covenant is the most sought after christian relic in history. in a recent trip, i met up with this man. he agreed to let me tag along on another fact-finding adventure. a former crime scene investigator, bob has made a name searching for biblal relics, taking the biblas a literal guide, he has traced from egyptian, searched for noah's arks and mount sinai gh after more than a century it was moved to nile river to lake ton na in ethiopia. this is where they say they had the it. we are going to go by with a boat. they are going to say the ark sat in a tent similar to the tabernacle in the wilderness. >> the monks living on the island haven't changed