This is a list of the various high points of the world which I have visited - high in a literal sense! I've included canyons, gorges, escarpments and rock formations.
I'm from the UK, so I've started with places from there. Then we move on to Ireland, mainland Europe, Asia, Oceania and South America, before finishing off with Mexico.
It's OK if you've only seen a place face to face, by the way - you don't need to have actually climbed any part of it. I'd say that I've been up at least part of most of the items which can be climbed, but not all.