Under Athens, Greece.
You guessed it…seating at the metro station close to the Acropolis. An interesting fact about building the Athens subway system. It took (takes) much longer than anticipated because digging tunnels for the trains, tracks, and stations often unearthed significant archaeological artifacts. When this happens, construction comes to a halt and cannot resume until an archeological dig has been completed. In fact, some stations actually display some of the artifacts that were found while the station was being built.
Reminds me of relationships: you often find the real valuable ones when you’re not really looking for them. But you have to pay attention and not run roughshod through them.