Royal Troon is one of the longest courses on the Open calendar yet its best-known hole is the shortest.
The Postage Stamp measures just 126 yards but its tiny green - just eight paces wide - makes it an elusive target and five deep bunkers surrounding it are highly punitive.
German amateur Herman Tissies took 15 there in 1950 but American legend Gene Sarazen, who won at Troon in 1923, holed in one in 1982 at the age of 70. The course also has the longest Open hole, the 577-yard sixth.
Just one hole has been altered significantly since the 1989 Open here, the 11th having been reduced from a relatively easy par five of 481 yards to a tough par four of 463 yards.
Here is a hole by hole look at the course, with the local name of the hole, yardage and par.
1. Seal, 364 yards/par four: The shortest par four on the course is a gentle start unless golfers are consumed by Open nerves. Two bunkers on the left must be avoided so players will drive to the right, which leaves a generous opening to the green.