Living in the UK has opened my mind to learning differences between American and British English.  And I can definitely say there are loads that I have learned.  I have always believed that a person can't really say he's been to a place unless he has learned the place's culture and has mingled with the people living there.  And in the UK, I learned how to drive right-hand.  It took me a few weeks to get used to it.  It was all fun after.  Having a booze at lunch time is normal there.  How I wish it's normal everywhere.  And yes, it always rains in the UK.  It will be a big celebration if they see a ray of sunlight and everyone will be out in their summer wear.  But you have to appreciate winter as well.  You can see all kinds of fashionista clothes around while sipping a mug of coffee in Starbucks.
I really wanted to visit Stonehenge in Wiltshire when I first came to the UK.  The myth has awaken my curiosity ever since (I constantly watched Sightings in the US before, that's why).  It's a place I could not miss seeing (I even cried when we first came there and we weren't able to get there on time).  On my second weekend, we visited a few castles in Wales (Caernarfon pronounced as Carnavon, Conwy, I can't remember the other castles though).  Almost every weekend, my friends and I drive somewhere.  We went to London, Dorset, Cornwall, Oxford (a university and a city in itself), Liverpool (ahh.. the Beatles :).  Unlike England with mostly green and flat land, Scotland was a country with so many reflection lakes (they call them lochs in Scotland) and mountains.  I enjoyed visiting Inverness and Edinburgh with friends/colleagues.  We were able to visit Roslyn Chapel (the infamous chapel in the Da Vinci Code book), Holyrood Palace, Edinburgh Castle, Urquhart Castle in Loch Ness.  Loch Ness was believed to house the monster that the Scots call Nessie.