Which country has the most well preserved history?

Would you say that it's Great Britain or maybe China, if we were going back 1000 years? Or maybe a different country? What if we were looking back 2000 years? And what if we looked even farther back in time than that? Maybe it's not even a country exactly, but a group of people instead.

This might be a silly question for experts or it might be a fairly interesting one. I'm sort of new to history research, but I've become very fascinated by the subject recently.