Palaminy is a 13th-century royal bastide. The site has been inhabited since prehistoric times. Palaminy was a stopover for pilgrims on their way to Santiago de Compostela along the route from Saint-Sernin to Saint-Bertrand-de-Comminges. There is a statue of Santiago de Compostela in the church.
The village covers an area of 11.1 km², and is crossed by the River Garonne. The right bank lies between the foothills of the Pyrenees (the Piedmont) and the river. The Spanish Renaissance-style castle, with its archway spanning the RD10, and the houses of the medieval quarter are well worth a visit. The church features a magnificent 17th-century altarpiece and a 16th-century piéta.
There is a lovely campsite on the right bank of the river.