On sims 3 world adventure where is the tomb of discovery?

There is one in one of the pyramids next to the Great Pyramid.....

In every tomb there is a mummy you find it in the end after finding all treasures and after finding all the hidden doors and door steps. Always remember to bring frozen food and somewhere to sleep because if the door closes you will be trapped for days.

Hope I helped =D

There are also mummies in France. Accept the adventure called "Nectar Research Assistant Needed." This will lead you on a very long adventure in which you'll gain access to Iseal's Tomb (Jean Necteaux's wife). There are two very creepy mummies in there for you to fight, feed mummy snacks, or run away from! Have fun :o)