Groups of burial mounds may be among the most tangible and visible remains of Europe's prehistoric past. Yet, not much is known on how "barrow landscapes" came into being . This book deals with that topic, by presenting the results of archaeological research carried out on a group of just two barrows that crown a small hilltop near the Echoput ("echo-well") in Apeldoorn, the Netherlands. In 2007, archaeologists of the Ancestral Mounds project of Leiden University carried out an excavation of parts of these mounds and their immediate environment. They discovered that these mounds are rare examples of monumental barrows from the later part of the Iron Age. They were probably built at the same time, and their similarities are so conspicuous that one might speak of "twin barrows". The research team was able to reconstruct the long-term history of this hilltop. We can follow how the hilltop that is now deep in the forests of the natural reserve of the Kroondomein Het Loo, once was an open place in the landscape.