Watch out for muggles around!
The cache is not hidden at the posted coordinates and it is not necessary to visit the place to get the final coordinates.
To create this mystery cache, we were inspired by an intriguing article about the London Underground and its map. Initially, the different lines of the London Underground were operated by various companies. Between 1897 and 1908, these operators published separate maps for individual lines, which came in the form of pocket maps, postcards, and posters. In 1908, the operators agreed to produce a joint map that included all the lines. Another map of London’s transport network was published in 1921. Although geographically accurate, it was highly confusing. The tangled mess of lines was mainly a result of the historical development and the chaotic layout of London’s streets.
In 1931, Harry Beck proposed a map design that simplified the representation of the railway network. Beck, an engineering draughtsman specializing in electrical system schematics, drew inspiration from his work on circuit diagrams. He devised a map that resembled an electrical schematic, where stations were spaced evenly, regardless of their actual geographic distances. To represent train routes, Beck used straight lines and 45-degree angles in distinct colors and introduced a clear, systematic way to denote transfer stations. Additionally, he deliberately distorted geographic proportions, making distant suburbs appear closer to the city center for better usability and clarity. The entire map now fit on a single page without the central area getting lost in a chaos of lines. After initial rejection, the map was published in 1933. Over the next 40 years, Beck continued to refine and expand the map, consistently referring to it as a "diagram" to avoid confusion with other types of maps. Beck's diagram was the first widely adopted topological map, and its original design is still used by many metro systems around the world. This is because his original idea makes a lot of sense: when you're underground in a metro, you don’t need to know exactly where you are geographically. What matters is where you entered, where you need to transfer, and where you’ll exit.
Our further research led us to the metro in Athens. Surprisingly, we found out that there is a metro station called Iraklio on the oldest Line 1. It is located in the municipality of Irakleio in the regional unit of North Athens and is marked at 19.246 km from the starting point at Piraeus. The present station was opened on 4 March 1957 and rebuilt on 18 July 2004. The station has two passenger platforms and a reversing siding.
And what if there were a metro in Iraklio on Crete? What might it look like?
Regardless of geological conditions and the overall improbability of such a project, and without conducting an Origin-Destination Survey, we have created the following diagram of the metro lines.
Source: Wikipedia
How to find the final coordinates
Enter the number of stations x on Line A and y on Line B in the format Ax_By into the Certitude checker to reveal the final coordinates and a hint for your next steps.
Just in case, a local cacher will provide maintenance assistance.