Kallithea Springs, RhodesThe 1929 Italian spa you should see twice — walk its mosaics by land, then watch its white dome slide past the rail from the sea.

Ten minutes after we clear Rhodes New Marina, there’s a moment I never announce, because it’s better unannounced. The coast bends, and a white dome rises out of the pines — arches, colonnades, a rotunda sitting right on the waterline like something dreamt up for a film set. Guests always ask the same thing: “What is that?” And I get to tell them: that’s Kallithea Springs — a 1929 Italian spa built for kings, ruined by war, and reborn as the most photogenic corner of this coastline. From the water, you understand what its architect actually intended — it was built to face the sea.

Kallithea Springs (you’ll also see Kalithea, or Kallithea Therme) sits about 9 km south of Rhodes Town, on the headland just before Faliraki. It is not a beach club and no longer a working spa — it’s a restored architectural monument wrapped around a small swimming cove: the white rotunda, pebble-mosaic courtyards, gardens, and clear, rocky water that snorkellers love.

Be honest with your expectations and it’s one of the best half-days on Rhodes: go for the architecture and the history, swim the little cove, and time your visit for the morning light. And here’s the part the guides skip — our day cruise sails right past it minutes after departure, so you can pair the land visit with the only viewpoint its builders cared about: the one from the water.

The story: a spa built for a king

The springs at Kallithea were celebrated long before the building — the waters here had a reputation for healing that goes back centuries. What turned a rocky cove into a landmark was the Italian era. In 1928, the Italian governor of the Dodecanese, Mario Lago, commissioned the architect Pietro Lombardi to build a thermal resort worthy of the springs’ reputation. Lombardi delivered something remarkable — white domes and arches that borrow from Moorish and Art Deco ideas at once, terraced into the rock so the architecture and the sea read as one composition.

The complex opened on 1 July 1929, with the Italian king, Vittorio Emanuele, in attendance — and for a decade Kallithea was an international health resort, drawing visitors from across Europe to take the waters. Then came the war, and after it, decades of neglect. The domes stood roofless; the mosaics filled with sand. The rebirth took until July 2007, when a long restoration returned the rotunda, the courtyards and the gardens to something close to their 1929 glamour.

The honest bit: there are no springs anymore

Most guides bury this, so I’ll say it plainly: the thermal waters no longer flow. You cannot “take the waters” at Kallithea Springs today. What you visit is the architecture, the gardens, the pebble mosaics, the exhibitions in the rotunda — and the swimming cove below, which is sea water, beautifully clear over rock.

If you arrive expecting a working spa, you’ll be disappointed. If you arrive expecting one of the most striking buildings in the Aegean wrapped around one of the prettiest small coves on Rhodes, you’ll leave happy. There’s a modest entrance fee for the site (check current prices before you go), a small bar, ladders off the rocks into the water, and some of the most reliable snorkelling close to Rhodes Town — the rocky bottom holds fish the sandy beaches don’t.

The film connection — same coast, same summer

If the cove feels cinematic, that’s not an accident. When The Guns of Navarone took over Rhodes in 1960, Kallithea’s photogenic rocks and arches made it one of the shoot’s locations — the same production that made a Hollywood star fall for a little bay a few kilometres south and accidentally rename it. That bay is Anthony Quinn Bay, and the full story is here. Visit both in one day and you’re effectively touring the 1960 set.

Seeing it from the water

Here’s the perspective none of the land guides can give you. Lombardi didn’t design Kallithea to be approached from a car park — the whole composition faces the sea. The dome crowns the headland, the arches step down toward the water, and the cove opens like an amphitheatre toward anyone arriving by boat.

On our day cruise we pass Kallithea about ten minutes after leaving Rhodes New Marina, close enough that the rotunda fills your camera frame with the morning sun on it. We don’t stop — honest disclosure; our swim stops are the bays further south — but it’s the opening scene of the day, and guests who visited Kallithea by land the day before always say the same thing: “Now I get it.”

Practical notes for the land visit

Don’t take my word for it

These are real, verified TripAdvisor reviews of DanEri Yachts — the boat that gives you Kallithea’s sea-facing profile on the way to the bays beyond it.