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,
Sugarloaf Mountain (Florida) epoch. Since the Pleistocene, the sands comprising the mountain have probably been uplifted due to isostatic rebound of the crust beneath the Florida Platform. The uplift is attributed to the karstification/erosion of the platform, which is reducing the weight on the underlying basement rock, triggering a process similar to post glacial rebound. Sugarloaf Mountain was recently recognized for its scenic, cultural, and historic value. The state of Florida designated the Green Mountain Scenic Byway, which primarily traverses the eastern side of the mountain. The route offers rare panoramic views of the surrounding landscape and access to newly acquired ecological preserves