This morning I took A&N to Mexico City's new aquarium (where the Beatles press conf had been), courtesy of Luis, its director. From street level you wouldn't think it's very big, occupying a modest triangle one-storey high. But, like an iceberg, most of it's below ground.
You start at the bottom with the big tanks with sharks and stingrays; then slowly make your way up past various ecosystems, coral, mangroves, jellyfish, freshwater fish, starfish and turtles (which you can pick up), ending up with penguins. I asked Luis how old they lived until. "About 15 years old. I hope they do anyway. They cost a fortune." It was pretty good. The girls loved it.