There's a reason that nothing much grows above ankle height on Unst - anything higher just gets blown away. During the time I was there I don't think the wind ever dropped much below about 30kts. Two of us tried to walk around Burra Firth and up to Hermaness, to get a view of the Muckle Flugga lighthouse, on the only relatively calm day off whilst we were there. We didn't make it, as we ended up knackered from trying to walk against the wind. Interesting anecdote; when my mother passed away a couple of years ago, we found the postcard I'd sent her whilst I was working up there. Has a neat post mark from the small post office in Haroldswick, hand franked with a stamp that reads "UK's most Northerly Post Office". There used to be an information board in the mess at Saxa Vord that had all the standard stuff about local amenities etc. Under "nearest railway station" it had Bergen, Norway listed.