Royal Portrush
British Open
This one may require an asterisk, but there are two courses at Royal Portrush – the Dunluce and Valley. The 2019 Open Championship was held on the Dunluce, but only after a renovation that included taking two holes from the Valley to build a new 7th (par 5) and 8th (par 4) to replace the old 17th and 18th holes, and turning the original 16th into the finishing hole. To make the Dunluce Links feasible to host a major championship required space for the exhibition tent, among other things.