Most walks in Athens point at the Acropolis. This one turns its back on it for the other marble landmark — the Kallimarmaro, the only stadium in the world built entirely of marble, where the first modern Olympics ran in 1896 — and the quiet neoclassical pocket of Mets on the slope above. Walk it in the morning, before the open ground heats up.
Start at the Zappeion and its gardens and walk out under the trees to the stadium. The horseshoe of white Pentelic marble is worth the entry fee to run the track, but reads just as well from the rail outside. Then climb Ardittos Hill behind it — five quiet minutes for the best angle there is, the marble glowing from above.
The First Cemetery is the unexpected heart of the walk: an open-air gallery of neoclassical sculpture, the Sleeping Maiden among the cypresses, almost silent. Climb back into Mets, the composed little quarter of painted houses and bougainvillea, then down through the National Garden to Syntagma and the Metro.