The Elizabeth Tower in Westminster chimes a song every 15 minutes, progressively adding a new verse for each quarter, until on the hour you get the full song fo

The Elizabeth Tower in Westminster chimes a song every 15 minutes, progressively adding a new verse for each quarter, until on the hour you get the full song followed by a bong for each hour that it is. As a child it fascinated me, but as an adult (who had a job in the area) it got tedious really quickly. 15 minutes is not that long.