First of all the jury is still out on whether even Christians go to Heaven. The Bible is rather ambiguous on the subject. The same goes for Hell. Most of the imagery we have for these places has developed over the years since the Bible was written. Christianity offers salvation it is true, but speculation on the exact nature of that salvation is just that – speculation.
The hills and mountains on your ways are going to be removed. But remember that’s what should happen when God gives you the shovel. Use your gifts; it’s the escape route!