Should we make a pond?

The photo shows a very large depression in our front lawn - it's around 2m x 2.1m, and about 25cm deep in the centre. No idea why it's there, perhaps there was a large tree stump which has decayed. The whole lawn is very uneven but this is the worst bit (causing hubby to curse whilst mowing...).
Should we cut the turf and fill the depression? Not sure we've got enough spare soil, to be honest... or would it be completely the wrong place for a wildlife pond? It's about 6m from the rowan tree whose trunk you can see. The garden wall runs approx E-W.
Since 2019 I've lived in east Clare, in the west of Ireland.
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Thanks for your positive comments! I think it'll happen, but not yet... we have a third of an acre which hadn't been touched for 17 years, apart from cutting the grass. Priority for the moment is digging out the brambles, couch grass, ground elder, wild arum etc from the area you can see, to make room for temporary homes for the plants brought from our Yorkshire garden, plus a small veg patch. It's good to plan, though.
Its so wonderful for wildlife. I hide behind the pergola and watch the birds bath like some peeping tom!
Beware of burning dinner getting distracted pond watching.....
The leaves will rot and form a natural silt at the bottom of the pond which is where many larvae and nymphs make their homes.
East facing, top of a hill clay-loam, cultivated for centuries (7 years by me). Birmingham
Your enthusiasm has persuaded me that we have to have a wildlife pond somewhere, even if not there! Thank you all.
Very few ponds have perfect locations anywhere. Despite what all the expert advice tells you, many ponds are in part shade, and near trees. I don't think any pond I've had has ever been in full sun. Just net it for the leaves dropping.
I live in west central Scotland - not where that photo is...