Gorilla trekking in on everyone’s bucket list for a reason: There truly is something life-changing about being among a handful of people in the world who get to spend time with a family of mountain gorillas. Pulled back from the brink of extinction, our nearest relatives reveal ourselves to us in their gestures, expressions, interactions and movements. Mothers will cradle their babies just as we do our own and fathers will put up with the youngsters clambering all over him as they play. The fact that it is an effort to find and see them only adds to the specialness of the occasion. A safari to Rwanda and Uganda (with Congo becoming popular to see lowland gorillas) is a holiday to remember forever.