Don't be put off by all the scaffolding around the Cathedral (though that does mean that photos are useless); go inside to see the gold and icons etc etc.
At 5pm each day they have a service and we happened to be there at 5.45 and so stopped for about 20 minutes. Really uplifting with magnificent singing and ceremonial.
Women need to cover their heads, but on the entrance table there are usually spare headscarves.
Don't miss it