Ireland. Lots of picturesque ruines = lots of picturesque curves.
Clockwise from top left: Kilmallock Priory, Clonmacnoise, Quin Abbey, Corcomroe Abbey, Rock of Cashel
Nature, pure and simple.
Numbers taking us back to times gone by, when things were cheaper* and we had a different currency.
*in absolute terms at least, maybe not relative to income.