Venizelou Metro Station, Thessaloniki, Greece
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Happened as dated, per the source[1]: "was officially opened on Saturday by Prime Minister Kyriakos Mitsotakis."Greece's Thessaloniki Metro Line 1 opened to the public, a driverless 9.6km line whose stations doubled as archaeological digs after more than 300,000 ancient artefacts were uncovered during construction.
≈$3.3B
1.00
