Clown graveyard

Even after more than 15 years in London I'm still learning about places in the city. Today was day 2 of our team strategy planning. At lunchtime a couple of us were talking about getting out of the office for some fresh air and one of my colleagues mentioned the nearby dead clown park. What??! 

The grave of [url=https://en.wikipedia.org/wiki/Joseph_Grimaldi]Joseph Grimaldi[/url] a clown from the 1780s - 1820s is in a small park between Angel and King's Cross. There are also two 'graves' which play different notes when you step on them, installed as a tribute to Grimaldi. This is two of my colleagues dancing out a tune.