The Monterey Bay Aquarium is one of the world’s best. You could spend an entire day there if you have the patience to tolerate hordes of people who come from all over. My grandson did, as he is fascinated with sea life. The exhibits of jellyfish and tentacled creatures are superb, matched by the famed underwater 28-foot kelp forest exhibit and the Open Sea Gallery. At $40 for an adult, admittedly needed to cover the cost of maintenance, support educational programs for children and conduct research projects, it isn’t inexpensive by any means.