Night falls over Machu Picchu to the sound of Abba's 'Dancing Queen'.

My marriage has worked because I am not around much.

I can be me, and people seem quite happy with that.

People look for patterns in everything. It's what keeps us sane, I suppose. I struggle to see any patterns in my life. I think I can understand depression a bit because of my sister. My own feelings of ... I'm aware that, if you feel down, it can be strangely unrelated to circumstances around you. That's just the way life is.

Once the travel bug bites there is no known antidote, and I know that I shall be happily infected until the end of my life

I've been lucky to have made a number of travel programmes with the BBC, the object being to see places off the beaten track. As a result, I've often had a guide who's been able to show me things that you wouldn't see with a tour group.

From my travels around the world I have seen how much damage and pollution is done by the careless disposal of waste. It is also evident that we in the West produce far more and throw away far more than the developing world, almost without thinking