Uyuni Travel Guide

Isla Incahuasi is a lone island rising about 80 metres from the centre of the Salar de Uyuni. Its ship-like silhouette earned it the nickname Isla del Pescado — Fish Island. It is the relic of an ancient coral reef, now covered in giant columnar cacti, some over 800 years old and 12 metres tall, their dried flowers and white spines glowing against the white horizon. Climb the trail to the top and a 360-degree salt desert unfolds, its edges dissolved by glare into sky — silent but for the wind. Most Uyuni three-day tours stop for an hour; the glare demands sunglasses at noon, while dawn or dusk brings softer light and fewer people.

The Salar de Uyuni lies on Bolivia's southern altiplano at 3,656 metres — the largest salt flat on Earth at over 10,000 square kilometres, its crust up to 11 metres thick, atop the planet's greatest lithium reserves. In the dry season (May-November) it bakes into a white geometric mosaic, hexagons blushing pink-gold at dusk; in the rainy season (December-April) a film of water turns it into a perfect mirror of sky — clouds and peaks underfoot, the most otherworldly landscape on Earth. The classic circuit: 4x4 convoys from Uyuni town across the salar, up Incahuasi's cactus island, past salt-brick hotels and on to deserts and high lagoons. Altitude UV is brutal and temperatures swing wildly — sunglasses, sunscreen and warm layers are non-negotiable.

The "Sky Mirror" is the mirror-like phenomenon that appears on the Salar de Uyuni during the rainy season (December to March), when a thin layer of water covers the salt flat and perfectly reflects the sky and clouds. Walking on it feels like strolling through the clouds — one of South America's most famous photography landmarks. The best moments are sunrise and sunset, with the clearest mirror on calm mornings after rain, and starry skies mirrored at night.

The Train Cemetery (Cementerio de Trenes) lies just outside Uyuni town in Bolivia's Potosí department — a rusting graveyard of steam locomotives on the altiplano. In the late 19th century this was a railway hub linking mines to the coast; as mining declined and a storm wrecked the rolling stock, trains were abandoned to the highland wind and sand, slowly merging with cacti, salt crust and red earth. Today the rusted carriages, overturned wheels and bare steel frames form a surreal industrial-ruin aesthetic under the ~3,670 m sun — a classic photo and sunset stop on the Uyuni salt-flat journey, and a witness to Bolivia's mining and railway rise and fall.

Volcano Uturuncu rises about 6,008 m on the Altiplano of southwestern Bolivia near the Chilean border, one of the country's highest climbable volcanoes. Still classed as potentially active — its surface has been steadily bulging for decades, drawing volcanologists from around the world — it offers climbers a rare prize: a non-technical summit. Four-wheel-drive vehicles reach roughly 5,400-5,500 m, leaving only a straightforward snow and scree slope that requires no technical ice skills. From the top, the Andes ripple toward the horizon and the Uyuni salt flats beyond.

Cactus Island (Isla Incahuasi) is a rocky islet rising from the center of the Uyuni Salt Flat, covered with tall, ancient giant cacti that contrast sharply with the endless white salt—and climbing it gives a sweeping view of the salt flat. Scattered across the vast white salt plain are rocky islets (remnants of ancient lake islands or reefs); Cactus Island is the most famous. On this rock grow dense, tall, upright giant columnar cacti—slow-growing, many centuries to over a thousand years old, over ten meters tall, ancient and gnarled. A green rocky island of ancient cacti, isolated in the endless white salt, makes a striking, unique sight. Climbing it, you see the ancient cacti up close and from its heights take in the vast white salt flat—open and stunning. Note altitude sickness. Admire the island and the salt panorama. At about 3,600+ m, watch for altitude sickness, take it easy, rest and hydrate; watch your step, protect the ancient cacti and island ecology, don't damage; sun protection; civilized visiting.