London's Trafalgar Square is one of my all-time favorite places. It could be because London's kick-ass National Gallery is right there, or the fact that M and I saw a De Beers commercial shot right there, of the fact that Pret A Manger is right across the street... Anyway, it's awesome.
Besides the very cool Nelson stature and the infamous lions that reside in the square, there is a "fourth plinth" that's home to specially commissioned artwork. Past works include Allison Lapper Pregnant and Model for a Hotel.
Currently there is a great installation - real people. 100 real people over the next 24 days, 24 hours per day. Check it out in REAL TIME at One & Other - I promise you'll be amused/amazed/astonished.