The Sagrada Família - Mimetic geocache (GCA83B8) was hidden a few steps from Gaudí's basilica, in Barcelona, Spain, by alfonsgf in May 2023.
It is a 3D-printed mimetic cache: an object designed, printed and hand-painted to blend into its surroundings, with a hidden compartment and a printed closure as well. alfonsgf, a family team of four who came to geocaching in 2013, have scattered around sixty of the same kind across Barcelona's landmark sites.
It was named geocache of the week in September 2025, then included in the selection of the ten best of the year.
The answer : 3D printing
Designed, printed and hand-painted to blend into its surroundings. Its owner, a family team, has sown some sixty of the same kind across the landmarks of Barcelona.