Specifying collision blocking tiles in a tile-based game

I have a scenario in a tile-based game where I need certain tiles to have collision. The player navigates with point and click, and the navigation system needs to know whether or not a certain tile is ‘filled’ (Has collision), so that it does not allow the player to traverse through or to it. I could place square volumes in every tile that should have collision, but that would add up to thousands that I would be manually placing. If I could paint collision in some sort of painter, and have Unreal recognize that, that would be great. Does anyone have any recommendations for easily specifying collision areas in a tile-based setting?