National Aquarium in Baltimore

Visitors are "spellbound" by this "jewel" of the Inner Harbor, a "gorgeous multilevel aquarium that gives you a scuba diver's perspective without getting you wet"; there's "tons to do" – from the "outstanding dolphin show" to the "walk-through rainforest" to the "impressive shark tank" viewed from "spiral walkways" – but it can get "jammed" and there's "annoying timed ticketing"; P.S. be sure to "plan for a whole day", especially now that they've added a 4D movie theater that uses sensory effects like wind, mist and seat vibrations.