12. Prisonview GC, USA

This golf course is set on the grounds of a maximum security prison. It’s a nine-hole, par-72 circuit with 37 bunkers and water coming into play on 16 holes. Unsurprisingly, they aren’t the only hazards to be wary of. Some of America’s most hardened criminals are actually employed in maintaining the course. Open to members of the public, a full background check is needed before entering.