Montezuma Castle National Monument, Arizona
You may not find anything more impressive than the perch that is occupied by this old high-rise building tucked away into limestone cliffs of the Camp Verde desert. Montezuma Castle was built between AD 1100 and 1425 and occupied by the Sinagua people. They used it as a home, and it included 20 rooms.
It happens to be among the first of four sites given the name “National Monument” in 1906. For decades, visitors could get to these ruins via a series of cliffside ladders. But now, to prevent any further damage, you can only view it from the ground. There are other dwellings around Montezuma Well, six miles away, some more than 1,000 years old.