Tomb Raider 3 Easter Egg - Indiana Croft

To see this egg you'll have to find the secret room in Croft Manor. To do this, face the stairs in the main hall and go right to the pool. Behind the trampoline you'll find a switch: press it and you'll open a secret panel in the main hall. Go there and switch up the lever: a timed door will open behind you. Run as fast as you can into it, and you'll find the secret room.

Now have a look all around: Among all the relics from the previous games, you'll see an Inca Idol that looks very much like the one Indiana Jones finds at the beginning of Raiders of the Lost Ark!