Rio de Janeiro is the second most populous city in Brazil, and was formerly the country's capital. It is known for landmarks like Christ the Redeemer statue, Sugarloaf Mountain, and the famous beaches of Copacabana and Ipanema. Some of Rio's most visited tourist attractions include Isla Grande with its 365 smaller islands full of marine life, and districts like Copacabana, Ipanema, Flamengo, Leblon and Botafogo. Important sites also include the Arcos da Lapa aqueduct, the pyramid-shaped Catedral Metropolitana de São Sebastião, and the colorful Escadaria Selarón stairs.