You crazy, some of the tombs are big and take much longer than 3 minutes. Some of the hidden tombs are dope as hell too.There's 9 tombs and they're like some 3 minute mini game
But if you're pockets were chubby and you didn't have to trade in each system to buy the new one just to keep up with everyone else you would have been able to just turn on your PS1 and play all the tombs you wanted until the cows came home.
Just throw a blanket over your head while you play ROTR and it'll feel like your in a tomb the whole time.