When the first settlers saw grand canyon they said?

The Grand Canyon was known to Native American tribes long before the arrival of European settlers. The first recorded European sighting of the Grand Canyon was in 1540 by García López de Cárdenas, a Spanish explorer who was part of Francisco Vásquez de Coronado's expedition to the area. Cárdenas and his men are believed to have been the first Europeans to set foot in the canyon, although they did not explore it extensively.

The first thorough exploration of the Grand Canyon was conducted by John Wesley Powell in 1869. Powell and his team of nine men spent three months navigating the Colorado River through the canyon, becoming the first people to successfully complete the journey. Powell's expedition provided the world with its first detailed account of the Grand Canyon, and his photographs and writings helped to popularize the area as a tourist destination.