How Do Archaeologists Know Where to Dig?

Archaeologists used to dig primarily at sites that were easy to find thanks to obvious visual clues. But technology—and listening to local people—plays a bigger role now.
Stone spheres in National Museum of Costa Rica. This pre-columbian artefacts from Diquis's Valley are symbols of national identity for Costa Rican people.

Objects of Wonder: Costa Rica’s Stone Spheres

The people who chiseled Costa Rica's stone spheres out of granite belonged to a distinct Latin American culture called the Chibchan.