Today I bring you a set of three special columns. They are two storeys high and have a walkway. If you place floortiles in the walkway, the Sims can go and have a look downstairs from the balustrade. You can also build a passage by placing them face-to-face for outdoor and indoor use.
A big thankyou goes to Michelle for making the set repository, meaning, you will need the Master pillar for the other two to show up correctly.