Which of these famous landmarks is in the Americas?

Created by millions of years of erosion, Antelope Canyon is part of the Lake Powell Navajo Tribal Park, located 10 minutes east of Page, near the Arizona-Utah border in the United States of America. Although it is one slot canyon, there are two points within the park that you can visit: Upper Antelope Canyon and Lower Antelope Canyon. Upper Antelope Canyon is at ground level, has less than a 2% incline, and is the more popular entrance. Lower Antelope Canyon requires walking down (and up) several flights of stairs and ladders.

Source: Visit Arizona