Angkor what is truly amazing. You could get lost for days around the site, it’s huge! I went a few times, on my first day a group of us went to see the impressive Angkor temple and then Ta Prohm the temple where Tomb Raider was filmed.
The second day I hired a bike and cycled from siem reap to the Angkor site and then peddled around a bit. It was so hot and quite hard but the long trip was quite rewarding!
On the 3rd day I went to Byon temple with all the beautifully carved faces! I think I preferred it to Angkor Wat. You could get lost around the site whilst exploring.