Another one from Portugal using gouache and inks on tinted paper. Sketched while sat in the shade of a spreading oak tree on one of the terraces in the fabulously strange and beautiful gardens of the Quinta Da Regaleira in Sintra. I highly recommend a visit, but take a torch to fully explore the tunnels.
I think you have to blur your eyes more than usual for this one to work….
Marker pen with carbon ink, water-brush with Lexington grey, gouache, A4