Sugarloaf Mountain and Urca Hill Natural Monument Mountain, then an island, on 1 March 1565. The site was chosen to guard the entrance to Guanabara Bay, and the mountain was important as a signalling point. A landfill connected the island to the mainland in 1697, and various buildings were erected to defend the territory, but the Urca urban neighborhood was only built 300 years after the city was founded. The Sugarloaf Mountain and Urca Hill Natural Monument was created by the city of Rio de Janeiro by municipal decree 26578 of 1 June 2006. The objectives are to guarantee green spaces for leisure in a natural area,
Humbug Mountain to rise directly from the ocean. It is considered a headland. Humbug Mountain was originally known as Me-tus by the indigenous Tututni people. When American settlers located the mountain, they initially named it Sugarloaf Mountain. In 1851 it began to be called Tichenor's Humbug when an exploring party sent by Captain William V. Tichenor, founder of Port Orford, got lost and headed north of the port instead of south. Tichenor stated that the name was chosen "to palliate their gross failure." Since that time, Tichenor's Humbug came to be known as Humbug Mountain. The mountain has also been called Mount