Isla del Sol and Moon Island: Inca Myth, Pilgrimage and Lake Titicaca

For the Incas, the sun was born on an island in Lake Titicaca. Isla del Sol, in Bolivia, and its small neighbour Isla de la Luna, the Moon Island, were among the most sacred places in the Inca empire, the destination of pilgrims from across the Andes and the setting of the stories the Incas told about their own origins. Archaeology has since shown that the islands were sacred long before the Incas arrived. Today they are farmed and lived on by Aymara and Quechua communities, and reached by boat from the lakeside town of Copacabana. On Day 15 of our South American Small Group History and Culture Tour, the group crosses from Copacabana by hydrofoil to both islands, on the way from Puno to La Paz.

Lake Titicaca as sacred geography

Lake Titicaca lies at about 3,810 metres on the high plateau shared by Peru and Bolivia. For the peoples around it, the lake was not simply a body of water but a source of life and a place of creation. The Spanish chronicler Bernabé Cobo, writing in the seventeenth century, recorded two Inca stories set on Isla del Sol. In one, after a long period of darkness, the sun rose for the first time from a great rock on the island. In another, people sheltered beneath the rock during a flood, and the island was the first land to appear as the waters fell. Other Inca traditions tell of Manco Cápac, son of the sun, emerging here to found the Inca dynasty. These are myths, recorded in different versions, rather than history, but they explain why the Incas invested so heavily in the islands.

Isla del Sol is the largest island in Lake Titicaca, about 14 square kilometres of steep, dry hills, eucalyptus groves and ancient farming terraces, many of which are still cultivated. More than 80 archaeological sites have been recorded on it. Isla de la Luna, a short distance to the east, is much smaller, about one square kilometre.

Moon Island and the Temple of the Sun Virgins

The tour’s first landing is on Moon Island, at the Inca complex known as Iñak Uyu. Its name comes from the Aymara for an enclosure of noble women, and it is also called the Aklla Wasi, the “house of the chosen women”. The Inca state selected young women, the aqllakuna, to live in such houses; they were among the empire’s finest weavers. On Moon Island the complex is associated with the worship of the moon.

The buildings stand near the island’s landing. Three facades survive, built of worked stone set in adobe mortar and marked by the trapezoidal doorways typical of Inca architecture; about half of what visitors see today has been reconstructed. Some writers suggest an earlier, Tiwanaku-period origin for the site, but that remains unconfirmed.

The island also has a much more recent history. In the twentieth century it was used as a prison. Paraguayan prisoners captured in the Chaco War built it in the 1930s, and it later held political prisoners, some of whom escaped across the lake. About 25 families live on the island today.

Isla del Sol: Inca tradition and pilgrimage

The Incas conquered the region in the fifteenth century and turned the islands into one of the great shrines of their empire. Isla del Sol’s Temple of the Sun is thought to have been developed under the ruler Topa Inca Yupanqui, in the later fifteenth century. Pilgrims came from far across the Andes, travelling through Copacabana, which the Incas resettled with colonists to serve the shrines. On the island, priests questioned visitors, and a sequence of roads, platforms and gateways led them towards the Sacred Rock at the island’s northern end.

Archaeologists including David Dearborn and Brian Bauer have studied how carefully that approach was staged. Near the rock lay a plaza whose long axis pointed to the sunset at the June solstice, entered through a single gate. A second plaza for ordinary pilgrims lay further away, and two stone pillars stood on a ridge beyond; from the commoners’ plaza, the solstice sun set over the elite gathered by the rock. Movement through the island was itself part of the ritual. In Cusco, the empire’s principal temple to the sun was the Qoricancha; our article on the Qoricancha and Inca sun worship describes the other end of that religious world.

Bauer and Stanish’s surveys showed that people had lived on the islands for some 3,500 years, and that ritual use began long before the Incas. On the islands they excavated a temple from the Tiwanaku period. The most striking evidence came from beneath the lake. In 2019 a team led by the underwater archaeologist Christophe Delaere published finds from the Khoa reef near Isla del Sol: ceramic incense burners in the shape of pumas, the remains of sacrificed young llamas, and ornaments of gold, shell and stone, including a puma figure in lapis lazuli. Dated to the Tiwanaku period, roughly AD 500 to 1100, the offerings had apparently been dropped from boats, centuries before the Incas. Our article on Tiwanaku and Puma Punku, visited the next day, explores that earlier civilisation.

The Inca steps and fountain at Yumani

The tour lands on the southern side of Isla del Sol, near the village of Yumani. From the jetty, a long stone stairway climbs steeply through eucalyptus trees, rising almost 200 metres in less than a kilometre. Near its foot is the Fuente del Inca, a spring with three spouts. Local tradition associates them with the Inca moral code of not stealing, not lying and not being idle, and early Spanish visitors took the spring for a fountain of youth. The group explores the Inca ruins and staircases here and stops for lunch before returning by hydrofoil.

How steep is the Inca staircase on Isla del Sol?

Steep, and at well over 3,800 metres, so take it slowly. The stairway gains almost 200 metres in less than a kilometre, on uneven stone steps. By this point the group has spent several days at altitude around Cusco and Puno, which helps, but there is no shame in stopping often. Your Program Leader sets a pace that suits the group.

Can you visit the north of Isla del Sol?

Sometimes, but access has been unreliable. In 2017 a dispute between the island communities of Challa and Challapampa closed the north of the island to visitors, and in 2018 Bolivia’s tourism authorities briefly suspended tourism on both islands. Travel reports suggest the north has reopened since then, but access has been intermittently restricted, and each community charges its own entry fee. The tour’s visit focuses on Moon Island and the southern end of Isla del Sol.

From Copacabana to the islands: a landscape in sequence

The day follows the old pilgrim route in its essentials: from the mainland to the islands and back by boat. It begins in Copacabana, whose basilica houses the revered image of the Virgin of Copacabana, the “Dark Virgin of the Lake”. The figure was carved around 1582 by Francisco Tito Yupanqui, an Indigenous sculptor of Inca descent, and installed in 1583. Copacabana’s role as a place of Christian pilgrimage, attracting tens of thousands of pilgrims each August, continues the importance the place had under the Incas. On Sundays, cars are lined up outside the basilica to be blessed.

After the islands, the group returns to Copacabana and drives along the lake, crossing the Strait of Tiquina by motorboat, to Huatajata on the eastern shore. Here the Altiplano Museum and the traditions of reed-boat building close the day. The group meets the Limachi family, whose reed-boat builders are linked to Thor Heyerdahl’s expeditions; Demetrio Limachi, from the lake island of Suriqui, helped build Heyerdahl’s reed boat Ra II, which crossed the Atlantic in 1970. The same totora reed sustains the Uros floating islands near Puno, visited the day before.

Respectful interpretation and current conditions

The islands are not open-air museums. They are home to farming communities, and the shrines and terraces visitors walk through are part of their land. Following local guides, paying community fees and keeping to paths are part of visiting well. Practical conditions can also change. Bolivia saw fuel shortages and long road blockades in 2025 and 2026 that disrupted travel to Copacabana; our Tour Specialists can advise on the current situation before you book.

Lake Titicaca links three of the tour’s richest days: the Uros and Sillustani from Puno, the islands of the Sun and Moon, and Tiwanaku from La Paz. Our overview of the South America cultural tour route shows how they fit the wider journey, and our guide to Bolivia covers the country in more depth. On the South American Small Group History and Culture Tour, a Program Leader and local guides bring the lake’s history together for a small group of up to 16 travellers.