Rough — the longer, unmanicured grass that borders fairways and greens — is one of the most important but least discussed elements of golf course design. The type, depth, and management of rough determines the penalty for errant shots and significantly shapes the strategy of every hole.

At the US Open, the USGA grows rough to four or five inches, making recovery shots from the rough nearly impossible and making the fairway the only viable route. At Augusta, the rough is relatively light, but the trees and pine straw create different types of challenging lies.

Some architects design holes specifically around natural features — rocky outcrops, ancient trees, clifftop edges, sand dunes — that were there long before the course arrived. These features give a course irreplaceable character that no amount of earthmoving can manufacture.

The great links courses of Scotland and Ireland are famous for their natural rough — fescue grasses, gorse bushes, heather — that create impenetrable walls of punishment just a few yards from the fairway. The visual boundary is dramatic, the penalty is absolute.