Using Rare Earth Magnets to secure structures on your layout

This is the best way I have found to secure various structures to a layout or diorama. The structures can be easily removed but are very secure as Rare Earth magnets are so strong. I am currently using 8mm x 2mm magnets I picked up at Harbor Freight for $3 for 10ea. I like these so much that I have ordered additional Rare Earth magnets from Amazon in smaller sizes.