Ok let's start. Tutorial for walkthrough entrance building :- )
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STEP 1: mark your terrain
STEP 2: Set the walkthrough alley
STEP 3: Finish the building with full walls
STEP 4: Rough decoration (statues)
STEP 5: Raise the ground level around the statues to roof level
STEP 6: Decorate more using flowers or grasses (personal style)
STEP 7: Lay paths and benches
STEP 8: Finish the building using hedges and trees.
DONE!
If something is unclear please get to me. Have fun!