Paros rewards a thin wallet: the ancient marble quarries, the Byzantine footpath and every beach on the island are free, buses reach anywhere for €2.40, and a bakery breakfast runs €3. Three days here cost less than one Santorini sunset table.
The ancient Parian quarries lie unfenced 5 km east of Parikia — free, unstaffed tunnels where the translucent lychnites marble was cut by lamplight. Bring a torch: the two main galleries drop roughly 90 m into the hillside.
Parikia's town beach curves 800 m north of the ferry port: shallow, tamarisk-shaded and completely free if you skip the sunbeds, which cost about €15 a pair. Free showers and a drinking tap sit at the chapel end of the sand.
The hilltop sanctuary above Krios bay stands open, unfenced and unticketed: 6th-century BCE terrace foundations, a rock-cut cistern and marble thresholds, with a straight-down view over Parikia's harbour and the whole Antiparos channel.
A 25-minute walk up the paved lane behind Parikia reaches this working monastery, free to enter outside the 13:00–17:00 siesta. Its whitewashed terrace frames the entire bay, Naxos and Antiparos, and the caretaker often offers cold water.
Parikia's marble-paved Market Street runs 400 m of whitewash and bougainvillea. At its head Ragoussis bakery sells spinach pies around €2.20 and sesame koulouri near €1 — the cheapest breakfast on the island if you carry it to the quay.
Nick's has grilled burgers and gyros just off Mavrogenous Square since the 1970s, a Parikia institution where island students and off-shift fishermen queue at the same window. Pork gyros in pita runs about €4, a double burger about €6.50.
Skip the harbour terraces and assemble lunch on the ring road: Parian graviera cheese near €2.50 a wedge, capers, tomatoes, olives and half a litre of bulk local wine come to under €10 for two. Producer stalls appear outside on Saturday mornings.
The fishing village 12 km south is where islanders actually eat: whitebait, fava and a carafe of house wine land at roughly €12-14 a head on the quayside, about half what the same plates cost in the capital. The bus takes 25 minutes.
The thousand-year-old marble-paved Byzantine Road drops from Lefkes to Prodromos in 3 km, free and waymarked with red dots. Slabs of Parian marble still carry cart ruts, and the walk takes about 75 minutes downhill through terraced olive groves.
This farming village hides behind a defensive ring of joined house walls pierced by two church gateways. Wandering the vaulted whitewashed lanes costs nothing, and Tsitsanis taverna on the square serves rabbit stifado with bread for around €9.
Wind-sculpted granite lobes split this Naoussa bay into a dozen pocket coves, every one free to swim from if you claim a slab of rock instead of a sunbed. The bus from Parikia is €2.40; the little boat from Naoussa quay runs about €5 return.
The headland park north of Naoussa opens free of charge with 4 km of marked coastal paths leading to the Korakas lighthouse and the sea-cave chapel of Agios Ioannis Detis. Sunset over Naxos from the western cliff needs no ticket and no booking.