2 Best Sights in São Conrado and Barra da Tijuca, Rio de Janeiro

A bit beyond Prainha, off Estrada de Guaratiba, is Grumari, a beach that seems a preview of paradise. What it lacks in amenities—it has only a couple of groupings of thatch-roof huts selling drinks and snacks—it makes up for in natural beauty: the glorious red sands of its quiet cove are backed by low, lush hills. Weekends are extremely crowded—arrive early—but during the week it's blissfully quiet and makes for a great day out from town. Take a lunch break at Restaurante Point de Grumari, which serves excellent fish dishes. If you've ventured this far, you might as well take a slight detour to the Museu Casa do Pontal, Brazil's largest folk art museum, and, for an in-depth look at one of the world's greatest landscape artists, the Sítio Roberto Burle Marx. Amenities: food and drink. Best for: surfing; sunset.

Nature lovers and architecture buffs will find it worth making the advance booking required to visit this plantation-turned-museum honoring Roberto Burle Marx, Brazil's legendary landscape architect. Marx, the mind behind Rio's swirling mosaic beachfront walkways and the Aterro do Flamengo, was said to have "painted with plants," and he was the first designer to use Brazilian flora in his projects. More than 3,500 species—including some discovered by and named for Marx, as well as many on the endangered list—flourish at this 100-acre estate. Marx grouped his plants not only according to their soil and light needs but also according to their shape and texture. He also liked to mix the modern with the traditional—a recurring theme throughout the property. The results are both whimsical and elegant. In 1985 he bequeathed the farm to the Brazilian government, though he remained here until his death in 1994. His house is now a cultural center full of his belongings, including collections of folk art, and the beautiful gardens are a tribute to his talents. The grounds also contain his ultramodern studio (he was a painter, too) and a small, restored colonial chapel dedicated to St. Anthony.