If this is the chain, how big is the bike?

Just had a weeks holiday on the Costa del Sol. Lots of sun, ate and drank too much, so the diet started today. On Friday we went for a drive down to a small harbour, wandering round I spotted this chain, not sure what part of the ship it's off, maybe the anchor chain. Its really expensive on the Costa del Sol, we are used to having half a bottle of wine included with our meals but down there its extra and very expensive, house wine is 12 euros a bottle.

I had the chance to try scuba diving, in the pool, not as difficult as I imagined.