Answer:
I build up castles. I tear down mountains. I make some men blind, I help others to see. What am I?
There's a one-story house in which everything is green. Green walls green windows green doors. What color are the stairs?
Used left or right I get to travel over cobblestone or gravel. Used up I vie for sweet success used down I cause men great duress.
Some will use me, others not. Some have remembered, others forgot. For profit or gain, I'm used expertly. I can't be picked off the ground or tossed into the sea. What am I?
I am flora not fauna. I am foliage not trees. I am shrubbery not grass.
Describes a mysterious region and a stylish pair of shorts.