Come across the pond. Spring and summer are beautiful. Lots of beautiful gardens, stately homes and castles to see.
We can row down the River Wye, stop for afternoon tea - the best is at The Angel in Abergavenny, or a beer, cider, G&T at Symonds Yat, then watch the peregrines feed their young on the rock.
We can go to the Roman baths in Bath, visit the Roman ruins in Caerleon, visit any number of thrift shops, and a quilt festival in Malvern. Then, there is the oldest map in the world - Mappa Mundi in Hereford Cathedral, and one of 5 (I think) of the original Magna Carta documents. If you like walking, we could walk Offa's Dyke; this is a walking route from Chepstow to north Wales, it more or less follows the border between England and Wales - it would take a week or so, stopping overnight in B&B's en route.
If history is not your thing, we could drive to the Lake district or the Yorkshire Dales - both national parks, or venture further into Wales, or drive up to beautiful Scotland, visit the innumerable islands including the Hebrides, Orkney or Shetland islands (cooler) but still beautiful.
Of course, we could go enjoy a festival or two - Glastonbury is legendary - chilled, laid back, and free mud baths if it rains!
Then there is London, and all the pomp and circumstance, but I prefer to stay away from there!
We are a small island, but so much to see and do - maybe a trip across to Ireland to complete your holiday before returning home?