Dominica celebrates Independence Day. Great Britain granted Dominica its independence in 1978. This small (about four times the size of Washington, DC) Caribbean island is located between Guadeloupe and Martinique. Around 70,000 people live among the rainforests and volcanic mountains. Known for its variety of amazing animals and plants (including bananas), the island is home to the world’s second-largest hot spring, Boiling Lake. Roseau is the capital.