>>1361782I googled this and I ended up coming across a bike (with Deltas) that has 24 karat gold plated components (24 karat means 100% gold by the way, I didn't even know this).
It fits both the criteria of this thread ("exotic" and "unusual") so enjoy, lads. The article accompanying it is interesting too.
https://cyclingtips.com/2018/06/bikes-of-the-bunch-2016-colnago-arabesque-living-room-special/