Colca Canyon is almost the deepest canyon in the world. The neighbouring Cotahuasi is 163m deeper but is a lot harder to get to and doesn't have the condor fly by.

Both are twice as deep as the Grand Canyon. From the view point to the river below is just over 1,000 m. I was feeling slightly dizzy sitting on the wall so made sure I kept one leg behind me.

The condors are huge and are capable of carrying off small sheep and motorcyclists.

Visit www.fowb.co.uk for more details on this and previous trips.