Cambodia
Don't just 'do' Siem Reap in a day, take a bunch of photos and then shoot off to Thailand. Once you've seen one temple you've not seen them all, any guidebook will tell you that.
Take time, find a decent guesthouse and spend at least five days there. Hire a bike and pedal round, stopping at anything that catches your eye. A five-day pass costs 60$USD, it will be one of the best buys you'll make.
Send your feedback or queries to been.there@guardian.co.uk
Search Been there
Your tips about Siem Reap