Cojitambo is a place in Ecuador that has a lot of history. It's like a big castle on top of a mountain that was built a long, long time ago by the Inca people. The Inca were a group of people who lived in South America a really long time ago.
Now, Cojitambo isn't used as a castle anymore, but it's still there and people can go visit it. There are some really cool things to see at Cojitambo, like old walls and buildings made out of rocks! People go there to learn about the Inca, take pictures, and just to have a fun day out with their family or friends.
While it might look like just a bunch of rocks, Cojitambo is actually really important because it helps us learn about the past and the people who lived in South America thousands of years ago.