Una Vida, Ancient Puebloan great house in Chaco Canyon, New Mexico.

Una Vida is a great house with at least two stories and 160 rooms, built of stone walls and wooden roof beams covered with mud and clay. It shares an arc or D-shaped layout with Peñasco Blanco and Pueblo Bonito, but a dog-leg addition was required by the topography. The site lies in a major side drainage near Gallo Wash.

Tree-ring dating places Una Vida's founding around 800 AD, at the same time as Pueblo Bonito, making it one of the three earliest Chacoan great houses. It was massively expanded after 930 AD. The site was first recorded in the mid-19th century by US military surveyors and was only partly excavated in the 1950s and 1960s.

The name Una Vida comes from Spanish and means "One Life". Petroglyphs around the site show human figures, solar signs and geometric forms, and Chaco Road once radiated from great houses such as Una Vida toward small house sites on the canyon periphery.

A one-mile round-trip trail guides visitors through the archaeological site, which remains in a largely unexcavated natural state. The location preserves the sense of how the ruins appear without extensive reconstruction or modification.

The structure's characteristic D-shape features an unusual extension added to accommodate the natural drainage patterns of the canyon floor. This practical design choice shows how builders adapted construction to the existing landscape.