Utrecht is shaped by a long ridge of hills and meltwater valleys formed during the penultimate Ice Age more than 150,000 years ago. From the Gooimeer to the Grebbeberg, advancing ice pushed up sand and stones into an impressive glacial ridge covering 23,000 hectares, with a relief you can feel throughout your ride. Flint tools point to very early human presence, yet for centuries this area remained rugged and quiet.

From the eighteenth century onwards, the southwestern flank developed into the Stichtse Lustwarande, a distinguished belt of country estates, castles and historic properties where nature and cultural heritage blend seamlessly. The Grebbeberg near Rhenen marks the end of the ridge, adding sloping woodlands, open fields and sweeping views across the Rhine Valley. Bunkers, trenches and the Military War Cemetery preserve the history of the Grebbelinie and the Battle of the Grebbeberg in 1940.