Museu de Arte do Rio
Rio's newest museum—opened in March 2013 and known as MAR by locals—is part of the revitalization of the port area of the city. Just the architecture alone—which won best building in a worldwide competition upon opening—is worth the trip. A wave-like canopy links the two distinct halves of the museum—one, a modern building with white pillars and frosted green glass; the other, the renovated Palacete Dom João VI, originally built in 1916. Once inside, take the elevator to the top floor of the modern building for breathtaking views of Guanabara Bay and the port district. And don't let the outside distract you from the exhibitions, which include a mix of classic and contemporary art. One piece not to miss is the Projeto Morrinho, a giant model of the favelas of Rio.