Shimmering at 3,812 meters above sea level on the altiplano between Peru and Bolivia, Lake Titicaca is the highest navigable lake in the world and a place of profound spiritual significance in Andean cosmology — according to Inca mythology, the creator god Viracocha emerged from its depths to create the sun, moon, and stars. The lake’s vast, deep-blue expanse stretches 190 kilometers across the high plateau, ringed by tawny hills and snow-capped Andean peaks, and supports extraordinary indigenous communities that have maintained their traditions for centuries in remarkable isolation.

The most famous inhabitants are the Uros people, who live on approximately 70 floating islands constructed entirely from layers of totora reeds harvested from the lake’s shallows. Visiting these spongy, undulating platforms — where reed houses, reed boats, and even reed watchtowers create a surreal world afloat — is an unforgettable experience, though one that has become heavily touristed. For a deeper cultural immersion, continue by boat to the natural islands of Taquile or Amantani, where Quechua-speaking families welcome travelers into their homes for overnight stays. On Taquile, men knit colorful woolen caps that indicate their marital status, the textile traditions are recognized by UNESCO, and community meals feature fresh lake trout and potatoes grown on ancient terraced hillsides with panoramic views across the endless blue water.

Pro tip: Skip the large group tours and arrange a private boat through your hotel in Puno — it costs only marginally more and allows you to visit the less-touristed outer Uros islands, where interactions with families are more genuine. An overnight homestay on Amantani island, where there is no electricity or running water, offers an unparalleled night sky with the Milky Way reflected in the still lake below.