A pool fed by rainwater in July to September. The El Morro pool is 12 feet deep and holds 200k gallons. After the Ancestral Pueblos moved on, Spaniards stopped here for water as early 1583 and continued for another 200 years. Centuries later the US Army used the pool while surveying the area for a new route west, beginning the next wave of visitors as part of America's westward expansion.
