Marriage anvil. This relates to marriage laws that are more permissive just over the border from England into Scotland, and apparently is still somewhat of a tradition.



More: https://www.gretnagreen.com/our-wedding-venues-b5

Previously:

Old hammer+anvil headache treatment - photo
Little vise with attached little two-horn anvil - photo
Floating an anvil in liquid mercury - video
Quenching an anvil in a river, with an excavator - GIF