Saturday, Aug 15, 2020, 3:46 pm

By:Tony Williams

#1 Zeeburg Island - Amsterdam

When Amsterdam was faced with three abandoned sewage treatment silos, they turned their lemons into lemonade by constructing a set of climbing towers. The public has access to both inside and outdoor climbing walls, as well as restaurants. The city also built offices and other commercial spaces, so you climb a silo on your afternoon break.