What landforms were most successful missions built along?

Answer: Spanish Missions in Texas

Explanation:

Spanish missions within the boundaries of what is now the U. S. state of Texas

The Spanish Missions in Texas comprise a series of religious outposts established by Spanish Catholic Dominicans, Jesuits, and Franciscans to spread the Catholic doctrine among area Native Americans, but with the added benefit of giving Spain a toehold in the frontier land. The missions introduced European livestock, fruits, vegetables, and industry into the Texas area. In addition to the presidio and pueblo (town), the misión was one of the three major agencies employed by the Spanish crown to extend its borders and consolidate its colonial territories. In all, twenty-six missions were maintained for different lengths of time within the future boundaries of the state of Texas.