Mesa Verde national park is in Colorado USA. It is well known there are Anasasi Indian's remains that prospered about 1400 years ago.
Many sites are on the hollow place above the cliffs. This site called 'Cliff Palace' and has over 200 rooms.
There are many sites around there.
This incomplete site is called 'Sun Temple' which is on the cliff. It looks like a labyrinth.
Anasasi Indian suddenly left from here about 700 years ago. It's mysterious.