The High plains can be described as mostly blank flatland, Canyon, mountains, Canadian brakes

It is mostly described as flatland

Explanation:

The high plains has the name "plains" inside which are mostly flat

answer; people where able to travel across the u.s.a faster than any other mode of transportation,travel time was about a week,from coast to coast

during the middle ages bibles and most christian literature was written in latin i think that’s the answer you are looking for