tool up on any ammo and health before you enter.! Press the detonator to blow the door and allow access to the inner tomb.
Use the crates to jump up to the fence and climb over. The gate to the dig site is locked and you haven't got the key, the only option is to climb over it somehow. You'll find that right now the door won't open, you need to find a way in or something to 'unlock' the door. Two directions one to some goodies the other to the main tomb entrance. You can't get to the ladder directly so use the various crates to hop/jump to it. Once past the gate you've got basically two directions you can go, the most obvious is up onto the wooden platforms. It's not quite a 'secret' but what you find will come in hand. Having said that if you have problems completing this RtCW SP map then have a look through the following as it outlines key elements to the map. A couple of the objectives are hidden from casual view so you'll need a keen eye.
The key to Relic Hunt is to look around as it's not quite the fragfest that one could expect. This page may take a while to load as it contains over 20 or so images, so 56k'ers and below be aware. Had fun playing Relic Hunt? You can support the creation of more RtCW and other content via PayPal, or make a purchase from KatsBits Store