On October 12, at 15:00 CEST I left my home in Dordrecht, the Netherlands, and walked in a western direction. At exactly that same moment Elia Torrecilla left her home in Valencia, Spain, and walked in a western direction.
When Elia changed direction (left or right) she texted me and I followed that direction as soon as possible. When I changed direction, I texted her and she followed me. We synchronised our walks as precise as possible.

Our Parallel Walk ended around 16:00 CEST, very close to the points of departure.

Image: Elia Torrecilla