Athens Below the Surface: A Walking Tour of the Podoniftis Stream

Long before Athens expanded, the Attic landscape was crossed by countless streams and waterways. One of the last surviving traces of that landscape is the Podoniftis stream, which once flowed through a landscape of orchards, gardens, and cypress trees north of the city. On this walking tour through the Patisia and Nea Filadelfeia neighbourhoods, you'll discover hidden layers of that older Athens. You'll also hear how refugee communities, a legendary cave taverna, and a deadly 1994 flood all shaped the stream's story.

The tour starts at the church of Agia Varvara outside Ano Patisia Metro Station. You'll cross under the Metro Line 1 railway bridge – once a crossing controlled by a literal chain lowered across the road for passing trains – before the stream first comes into view through the trees along Chalkidos Street. Walking along Perissou Street, you'll get your first close look at Podoniftis, its banks dense with eucalyptus, fig trees, and reeds, with water birds and even herons hunting in the shallows.

Further along, the tour descends toward a terrace overlooking a deep ravine where a priest named Papalefteris once lived beside the water in a cave-like shelter, later the site of a legendary riverside taverna called Spilia. You'll also pass a stark concrete flood-control channel built after the catastrophic 1994 flood that killed 17 people, and learn how that disaster triggered a landmark legal decision halting further canalization of the stream. The tour ends at a small park near Papanastasiou Street, from where Perissos Metro Station is a short walk away.

On this 75-minute tour, you'll have a chance to:

• Hear stories of 19th-century Athenians who came to Paradisia – this area's former name – for picnics and fresh water
• Spot fish, frogs, and herons along one of Athens' few remaining urban stream ecosystems
• Cross a pedestrian bridge with views of Podoniftis flowing through dense riverside vegetation
• Learn how the street names nearby – Smyrnis, Kordeliou, Ionias – preserve the memory of Greek communities expelled from Asia Minor in 1922
• Visit the church of Agia Efimia, built by refugee families as a place of memory and belonging
• See where Greece's Council of State blocked plans to turn Podoniftis into a concrete stormwater channel

This tour reveals an Athens most visitors never see – and many locals have forgotten.