A visit to dad's work today. These were steel bars which poked out of the ground as part of the building's foundation. The yellow caps serve little more purpose than to act as a safety meaure so that people don't step on/trip over/walk into the steel bars.
26, Australia, medical graduate, doing my best to shoot every day. :)
My f/1.4 lens rarely leaves my 500D body! I... learn more