The Grand National fences provide a unique test of a horse's jumping ability, with the birch-topped obstacles a far cry from the regulation fences.
So what does it take for a horse to conquer Aintree's behemoths?
In association with Old Gold Racing, we sent Richard Johnson down to Lambourn to give Francesca Cumani a lesson on how to jump the Grand National fences.
After a windy morning conquering the fences, the pair sat down for a coffee and chat about all things Aintree.
Plus, download your sweepstake kit for the big race on Saturday.