Home of what was until recently the world’s largest fish tank, according to the Guinness Book of World Records, the New England Aquarium offers a riveting museum experience which showcases an incredible variety of fish and other types of animals. After recent expansions, it now also has a humongous IMAX theatre, whale-watching tours operating from its pier, and a marine mammal arena out back. It also is known for its penguins, which are a fascinating experience even on their own. It’s well worth a visit.