In 2004 we visited the Ancient Greek/Roman site at Kourion in Cyprus. We came across mosaics that were completely open to the elements and which you could actually walk all over! (I hasten to add that we didn't). It was a stunning site which included the "earthquake house," very poignant. I sort of like the freedom to wander all over amazing historical sites unencumbered. When I was in my teens we could wander all over Stonehenge without paying a penny and without being shut out by fences. It's a magical thing to be able to do. Sadly, I can also see the need to be very protective of these treasures, so mixed feelings...

The mosaic in London is absolutely stunning.