The Sugarloaf Mountain is located at the mouth of the Guanabara Bay (Baia da Guanabara) in Rio de Janeiro. The view from the top of the 1,299 ft mountain is spectacular. You can also take a glass-walled (bondinho) cable car that runs between the peaks of Sugarloaf Mountain and Morro da Urca.
To me, Rio is one of the most beautiful places on Earth, and definitely my favorite.
If you ever go to Rio, do not miss the Pao de Acucar!