Alto de los Ídolos, about 4 kilometres from the village of Isnos (itself a short distance north of San Agustín), contains the tallest statue in the entire San Agustín archaeological zone — a single figure standing 7 metres high, carved from a single stone. The scale is startling in person; photographs don't prepare you for it.
The site is more compact than the main Parque Arqueológico but has its own distinct character. The journey there — across the Magdalena gorge by boat or bridge, then up into the hills — is part of the experience. Alto de las Piedras, a few kilometres further into the Isnos area, contains the "Doble Yo" (Double I) statue, notable for its unusual double-faced carving. Most visitors combine both Isnos sites in a single excursion from San Agustín, which makes for a full day.