The Virgin Islands, commonly referred to as the British Virgin Islands, is a British overseas territory located in the Caribbean to the east of Puerto Rico. The islands make up part of the Virgin Islands archipelago; the remaining islands constitute the US Virgin Islands and the Spanish Virgin Islands. The largest island, Tortola, is home to the capital, Road Town, and rainforest-filled Sage Mountain National Park. On Virgin Gorda island is the Baths, a labyrinth of beachside boulders.