After the highs of trekking in the Himalayas, it is time to descend into the Kathmandu Valley, the cultural heartland of Nepal.
This 30-kilometre wide valley is home to no less than seven Unesco World Heritage sites - more than most countries - and in spite of the extensive damage done by a 2015 earthquake, each of them presents a colourful and compelling record, stretching back to medieval times, when three kingdoms fought for supremacy in Nepal.
