The best place in South Korea is my house.
When I travel much good place, after I got home, I always say 'Home is best'.
House is warm, has bed, and I have everything that I need.
On earth, -rather in space, my house is best.

= The best place in South Korea is my house.
Whenever I travel to many beautiful places, after I got home, I always say 'Home is the best'.
My house is warm, has a comfortable  bed, and I have everything that I need.
On earth, or even in space, my house is the best.