On instagram I stumbled across the account of coordinates collection. This American jeweler specialises in ‚travel jewelry‘. According to their credo: „Every memory has its place.“ they sell bracelets, necklaces or rings on which the latitude and longitude coordinates of every place can be engraved.
I think it’s a lovely idea to be reminded that way of a lovely travel. Of course I would choose: 36.4622° N 25.3763° E. The coordinates of Οία, Santorin!