Trsteno Arboretum

Where it sits. Trsteno is a village on the coast road about eighteen kilometres northwest of Dubrovnik, on a shelf of hillside that drops steeply to a small harbour. The arboretum occupies roughly twenty-five hectares of that slope: a formal Renaissance garden around a summer villa, an olive grove, terraces of citrus and, below, a strip of Mediterranean woodland running down to the water. Because the ground falls away so sharply, the garden is experienced as a sequence of levels rather than a single view, and every few dozen paces the sea appears again through a different frame of pines.

The oldest garden of its kind here. The Gučetić family, one of the patrician houses of the Republic of Ragusa, began building their summer estate in the 1490s. What they laid out was the standard Ragusan villa formula — a house, a walled garden of geometric beds, a pergola and a working orchard — but it is the only example of that formula on this coast to have survived continuously for five centuries. A stone aqueduct of about seventy metres, built in the 1490s to bring spring water to the estate, still runs, and it feeds the grotto fountain of Neptune added in 1736, where the god stands between two nymphs above a pool full of goldfish. From 1948 the estate has been held by the Croatian Academy of Sciences and Arts, which turned it into a scientific arboretum and added collections of exotic species from Asia, Australia and the Americas to the historic Mediterranean planting.

The two planes. At the road junction above the entrance stand two Oriental planes, Platanus orientalis, planted from seed brought back by Ragusan sailors and now roughly five hundred years old. They are among the largest of their species in Europe: crowns well over forty metres across, trunks around five metres in diameter, with vast buttressed roots that have lifted the pavement. They survived a direct hit in 1991, when shelling during the attack on the Dubrovnik region set the estate alight, and again in the wildfire of August 2000 that destroyed a substantial part of the collection. Their scorched lower trunks are still visible.

On screen. Trsteno is the Red Keep gardens in Game of Thrones, used across the third and fourth seasons for almost every scene in which King's Landing politics happen among plants rather than behind stone. The colonnaded pergola near the villa, hung with wisteria and vines, is the walkway where Sansa Stark and Margaery Tyrell talk; the stone benches and paths below it carry Olenna Tyrell's conversations, including her negotiation with Tywin Lannister over the marriages that will shape the following season, and her exchange with Varys. The production returned here rather than building a garden set because the combination of mature planting, formal geometry and a sea horizon with no modern buildings in frame is genuinely hard to fake. Nothing of the Red Keep itself is here: the castle behind those conversations is a matte painting and a Belfast set, and the gardens sit twenty kilometres from the walls that stand in for the city.

What you actually see today. Entry is through the upper gate near the road, into the formal garden with its box-edged beds, ancient oleanders, palms and a small chapel. The Neptune grotto is a few minutes downhill, cool and dripping even in August. Paths continue past the villa — not open to visitors, and still bearing repair work — through the olive terraces and into the woodland, where the descent to the little harbour of Trsteno takes about fifteen minutes and the climb back rather longer. Labelling is patchy and the atmosphere is scholarly rather than manicured; parts feel neglected, which is honest for an institution that has been rebuilding after fire twice in thirty years.

Getting there and timing. Local buses on the coastal route between Dubrovnik and Ston or Split stop at Trsteno, a journey of roughly thirty-five to forty-five minutes from the main bus station, with the stop directly beside the two planes. By car, the D8 coast road passes the entrance, and there is limited parking on the verge. The arboretum opens daily with longer hours from May to October and shorter ones in winter; the entrance fee is small. Paths are gravel, uneven and steep in places, so the lower garden is hard going for wheelchairs while the upper terraces are manageable. Morning light comes across the sea and into the pergola, which is the shot most visitors are here for.