Mexico City - Zócalo (Plaza de la Constitución)

The central feature of Mexico City is the Zócalo (Plaza de la Constitución), where Mexico's first Constitution was proclaimed in 1813. Measuring some 240 m (780 ft) each way, it is one of the largest squares in the world. The Spaniards began to lay out the square immediately after the conquest of Tenochtitlán, with its northern half overlying the southern part of the demolished Aztec temple precinct, the Teocalli. In the early colonial period the square served a variety of purposes - as a bullfighting arena and a market, among other things. Today the square is one large empty space, which is used for festivals, parades and demonstrations. A huge flag is hoisted every morning. In the Metro station below the square models are on display