A map from 1920 of Porto Rico (Puerto Rico) with inset maps detailing the Danish West Indies (St. Thomas and St. John) and British Virgin Islands, Santa Cruz (St. Croix), and the islands of Culebra and Crab Island (Isla de Vieques). The map shows the capital of San Juan, major cities and towns, railways, main roads and cart roads, lakes and rivers, mountains, coastal features, and smaller neighboring islands.