Mexiquillo, Natural park in Pueblo Nuevo, Mexico

Mexiquillo is a natural park of 13,475 hectares in Pueblo Nuevo, Durango, on the Sierra Madre Occidental. Its dense conifer forest holds endemic pines such as Pinus durangensis and Pinus engelmannii, and the main Mexiquillo waterfall drops 20 metres over a curved rocky ledge into a pool. Plains of igneous rock formations, some over 7 metres high, are known locally as the Jardín de Piedras.

The area began in the 1960s as a temporary railway construction camp when workers carved tunnels through the mountains. Decades later, visitors rediscovered the abandoned tunnels and the region eventually became a protected natural space.

The park's name comes from the Mexiquillo waterfall, the best known of its many cascades, which drops 20 metres. Local people call the field of igneous rock formations up to 7 or 8 metres tall the "Jardín de Piedras", after the way the boulders stand in clearings of the conifer forest. Several films were shot here, among them Caveman with Ringo Starr and Dragon Ball Evolution.

Access is via the Durango–Mazatlán highway (Federal Highway 40), leaving it at the signed turnoff in La Ciudad, about 135 km west of Durango city; the park entrance is at 23°43′20.65″N 105°40′49.74″W. Lodging is available near La Ciudad, so the park is not without accommodation. Bring a flashlight for the tunnels, where visibility is lost inside.

The nine railway tunnels measure 5 metres wide and 6 metres high, built as barrel vaults for a train that never ran; their lengths run from 100 metres to 1.68 kilometres. The last one was blocked by a landslide in 2009. Visitors need torches inside, where visibility is lost.