Destinations

Location: largest island of the Tuscan Archipelago, between Corsica and the Tuscan mainland

Scale: the largest estuary in the United States, roughly 200 miles from Havre de Grace, Maryland to Norfolk, Virginia, 4 to 30 miles wide, with 11,684 miles of shoreline, more than the entire US West Coast

Scale: the Kimberley coastline runs over 12,000 km including islands and inlets, per Wikipedia, with more than 2,500 adjacent islands; the direct sea route from Broome to Darwin is 889 nautical miles, roughly 3.7 days' steaming

Location: Ecuadorian archipelago in the Pacific, roughly 1,000 km (about 600 miles) west of mainland Ecuador, straddling the equator

UNESCO first inscribed Halong Bay in 1994 and again in 2000; in September 2023 it extended the listing into the transboundary Ha Long Bay - Cat Ba Archipelago site, joining it to Lan Ha Bay and Cat Ba Island

Status: British Overseas Territory, two banks (Turks and Caicos) separated by the Turks Island Passage, which drops to about 6,500 feet

Region: Port Jackson (Sydney Harbour) and the New South Wales coast, Australia

Region: Langkawi archipelago and the Malacca Strait, north-west Malaysia

Region: Puerto Rico, Culebra and Vieques (the Spanish Virgin Islands), a US territory in the eastern Caribbean