This timed Lego Challenge involves the hidden depths of the ocean's depths in your search for the mythical City of Atlantis. You will need to build a Lego boat that passes a float test, a sea monster, your version of the City of Atlantis and a few other things.  This Lego challenge is unique in that your build must pass a float test and a dive test.   Are you ready to dive into these unexplored waters and find the lost City of Atlantis that sank into the ocean?