Perched in the saguaro-studded hills above Roosevelt Lake in central Arizona's Tonto Basin, Tonto National Monument protects a pair of remarkably well-preserved cliff dwellings built by the Salado people some 700 years ago. Tucked into natural alcoves in the hillside, these stone-and-mortar rooms have survived since the 13th, 14th, and early 15th centuries, offering a vivid window into life in the prehistoric Sonoran Desert.

The star for most visitors is the Lower Cliff Dwelling, reached by a paved but steep half-mile trail that climbs about 350 feet from the visitor center. It's open year-round for self-guided visits, and you can actually step among the rooms of the two-story, 19-room ruin while soaking in sweeping views over the lake and desert below. From November through April, rangers also lead reservation-only guided hikes to the larger, more remote Upper Cliff Dwelling — a 3-mile round trip on a rougher trail.

An entrance fee applies (America the Beautiful passes are accepted), and the monument is open year-round, though the desert can be brutally hot in summer — go early, carry plenty of water, and wear sturdy shoes and sun protection for the exposed climb.

Pair a visit with nearby Roosevelt Lake and the Apache Trail for a full day exploring the history and scenery of the Tonto Basin.