WTied islands, or land-tied islands as they are often known, are landforms consisting of an island that is connected to land only by a tombolo: a spit of beach materials connected to land at both ends. St Ninian's Isle, in the Shetland Islands off the north coast of Scotland, is an example of this; it was once an island but is now linked to the Mainland. Other examples include: Maury Island, Washington in the Puget Sound, Coronado, California and Nahant, Massachusetts in the U.S.; Barrenjoey, New South Wales in Australia; and Wedge Island in Western Australia.
WGrótta is a tied island at the extreme end of Seltjarnarnes in the Capital Region of Iceland. During high tide the tombolo is completely submerged, turning Grótta into an island.
WBarrenjoey is a locality in the suburb of Palm Beach, at the most northern tip of Pittwater. The headland is made up primarily of sandstones of the Newport Formation, the top third is a cap of Hawkesbury sandstone. Around 10,000 years ago the headland was cut off from the mainland due to the rising sea level; subsequent buildup of a sand spit or tombolo reconnected the island to the mainland. It is the location of the Barrenjoey Head Lighthouse, a lighthouse that was first lit in 1881. In 1995 Barrenjoey was gazetted into Ku-ring-gai Chase National Park.
WNaval Air Station North Island or NAS North Island is located at the north end of the Coronado peninsula on San Diego Bay and is the home port of several aircraft carriers of the United States Navy. It is part of the largest aerospace-industrial complex in the United States Navy—Naval Base Coronado (NBC) in San Diego County, California.
WThe Isle of Portland is a tied island, 6 kilometres (4 mi) long by 2.7 kilometres (1.7 mi) wide, in the English Channel. Portland is 8 kilometres (5 mi) south of the resort of Weymouth, forming the southernmost point of the county of Dorset, England. A barrier beach called Chesil Beach joins it to the mainland. The A354 road passes down the Portland end of the beach and then over the Fleet Lagoon by bridge to the mainland. The population of Portland is 12,797.
WScotts Head is a village on the southwest coast of Dominica, in Saint Mark Parish. In 2001, its population was 721. Predominantly a fishing village, Scotts Head overlooks Soufrière Bay, which is protected as the Soufrière Scotts Head Marine Reserve. It is also a popular snorkeling and diving site for tourists.
WSt Ninian's Isle is a small tied island connected by the largest tombolo in the UK to the south-western coast of the Mainland, Shetland, in Scotland. It is part of the civil parish of Dunrossness on the South Mainland. The tombolo, known locally as an ayre from the Old Norse for "gravel bank", is 500 metres long. During the summer the tombolo is above sea level and accessible to walkers. During winter, stronger wave action removes sand from the beach so that it is usually covered at high tide, and occasionally throughout the tidal cycle, until the sand is returned the following spring. Depending on the definition used, St. Ninian's is thus either an island, or a peninsula; it has an area of about 72 hectares.