Traveler’s Notes . . .

Sea World of Florida in Orlando this month opened a 12-acre entrance area and “Journey to Atlantis,” a combination water ride and roller coaster--the park’s biggest expansion ever. . . . Responding to fires in Malaysia that have spread smoke to some countries in the region, Singapore-based Star Cruises is offering a “haze-free guarantee” to passengers on its Star Aquarius liner in the South China Sea between May and October. They will get a voucher for a free cruise if air pollution hits unhealthy levels during their shore excursions. . . . “The Nature of Diamonds” exhibit at the American Museum of Natural History in New York City, originally set to close this weekend, has been extended to Aug. 30. It includes the world’s third largest cut-diamond and jewels from the Kremlin State Museum. Information: (212) 769-5200. . . . “Battleship!” an exhibit marking the 100th anniversary of the Spanish-American War, opened this weekend and runs through Sept. 30 at the Mel Fisher Maritime Museum in Key West, Fla. It features battle facts and life aboard naval ships of the era. Information: (305) 294-2633.