Cruise along the alluring northwestern coast of Antigua in a sleek catamaran and pause along the way to snorkel in the crystal-clear waters. As you leave the sheltered harbor, one of the first sights will be Fort James, an 18th-century stronghold that overlooks a beautiful sugar-white beach. Afterwards, the captain will stop in an area likely teeming with marine life. If you choose to snorkel, you may spot species such as rainbow parrotfish, tiger groupers and French grunts. The water can be stunningly clear, allowing you to easily make out the wonders beneath the surface. A light buffet lunch will be served on board, along with champagne and most any other beverage from the open bar. In time, the catamaran will beach on a gorgeous stretch of sand so you can relax, stroll along the shore and take a refreshing swim.