This is a replica of the 1960s archway over the entrance Mountain Park in Holyoke, MA. I've included the clown image in case you want to use it. But you could affix any appropriately-sized graphic onto the arch structure. The clown was designed by the late great Dominic Spadola of Rhode Island.

You'll need two pillars for each arch. Glue the pillar into the base, then glue the cap on top of the pillar. The arch posts get glued into the slots on the caps.