Each morning I travel to work by bus. Mal, VK2BMS, drew my attention to an interesting antenna that is visible on the left as you start on the Sydney Harbour Bridge.
I captured this on my phone through the bus window and high speed, that's my excuse.
Mal writes: "The domed rod on the right is a lightening conductor and left is a Hygain 40 to 10mx trap vertical 14AVT of the late Ray,VK2BBP.
It looks professional and repair people on the roof probably think it's part of the building or don't know what it is and frightened to touch it."
Not sure that being pointy and higher than a nearby lightning conductor is a good idea.