Rio de Janeiro

You rarely have to ask cariocas to say cheese! when snapping a photo. Residents of Brazils largest city already have plenty of reasons to smile: Lush, hilly surroundings that culminate in the iconic Sugerloaf and Corcovado mountains; Ipanema Beach and the Copacabana Promenade, where buff bodies squeeze into the skimpiest of swimwear; the annual Carnival celebrations in February or March; and the 2014 FIFA World Cup final, where a Brazil victory would turn smiles into ecstasy.