Sadly not bike related.. saw this in a loft this week, a Hornets nest .. amazing to think they can make these. One part was like a lamp shade !
It was built over a chimney breast, so I'm guessing it's shaped like that to act as a duct to trap the rising warm air.
It was built over a chimney breast, so I'm guessing it's shaped like that to act as a duct to trap the rising warm air.