What is the best place where there's no earthquakes

The best place were there are no earthquakes is kingman, Arizona.

On a plane! Just kidding :)  The Earth is made up of plates that can and do move.  Some of the plates are more active than others, such as those that make up the Pacific Rim so their earthquakes are more active, higher in magnitude, and can be very destructive. In fact, there are thousands of earthquake that occur every week on our planet, but most are so small that you don't even feel it.  So, theoretically there is no place on Earth that is free from Earth's quake, so to speak, but in many places, most earthquakes happen so infrequently (1-5 every 100 years), or are so small, that you could say that those places are earthquake free; Ireland, Northern Europe, Newfoundland, parts of Arabia, parts of the US midwest, eastern Europe, to name a few.