Ever felt that irresistible urge to transcend the ordinary? To stand tall, literally, amidst the clouds? The beckoning call ...

Plotting the course: I was invited to photograph a group of German geologists who were using very detailed GPS readings to measure how tectonic-plate movement is shifting the Rwenzori Mountains.

My name's Seren and today I'm exploring the UK's tallest mountains. I'm in Wales on my way up a mountain called Pen Y Fan, which is Welsh for top spot. And it really is. It's the tallest mountain ...