Great Blue Hole
The Great Blue Hole is a giant marine sinkhole off the coast of Belize. It lies near the center of Lighthouse Reef, a small atoll from the mainland and Belize City. The hole is circular in shape, across and deep. It was formed during several episodes of quaternary glaciation when sea levels were much lower. Analysis of stalactites found in the Great Blue Hole shows that formation took place 153,000; 66,000; 60,000; and 15,000 years ago. As the ocean began to rise again, the cave was flooded. The Great Blue Hole is a part of the larger Belize Barrier Reef Reserve System, a World Heritage Site of the United Nations Educational, Scientific and Cultural Organization (UNESCO).
Winmalee, New South Wales
Originally known as North Springwood, Winmalee was officially established in 1972. Springwood is historically significant as the first settlement in the Blue Mountains. Winmalee is surrounded by Blue Mountains National Park. This National Park is on the World Heritage List and is known as the Greater Blue Mountains Area World Heritage Site. The Blue Mountains area is unofficially known as "The City Within a World Heritage National Park". Winmalee extends north from Linksview Road and Birdwood Avenue to Coramandel Avenue and east to a point part-way along Singles Ridge Road.