Landing on the Rock is wonderful, it's less hairy now that Spain allows over-flying across the Bay, originally planes came in from the Atlantic along the middle line, dropping and turning simultaneously. They had to maintain a certain height until the last minute, it was quite an experience. Reference the apes, keep hold of everything, not just your bag, they love sunglasses. Try to get a visit into St Michael's caves, I think they're more commercial now, used to be only with the Army.