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Vallemi Caves

Limestone caverns near the Apa river in Concepcion department, in the country's main limestone belt.

Updated 14 October 2026

Typecave
WhereConcepcion
Nearest cityVallemi
Best seasonMay to September
Time to allowHalf a day
Getting thereNear Vallemi in northern Concepcion; rough roads and river access
EntryCharged; guided visits

Vallemí sits on the Río Paraguay in the north where the country's principal limestone deposits are worked for cement, and the same rock holds a set of caves in the hills behind: Tres Cerros, San Lázaro, Santa Caverna and others, with chambers, stalactites, flowstone and, in some, underground pools of clear water. They are visited with local guides who bring lights, since none of them is developed with fixed lighting or walkways, and access involves scrambling and stooping. The area is remote, reached by rough road or by river, and the cement works dominates the local economy. The Apa river forms the frontier a short distance north.

Highlights

  • The cave chambers - the limestone rooms with their formations.
  • Underground pools - the clear water in some of the systems.
  • The limestone hills - the karst country behind the town.
  • The cement works - the industry the town lives from.

When to go

May to September in the dry season, when the roads are passable and cave water levels lower; the wet season floods parts of the systems and makes access difficult. Guides are arranged in Vallemi.

Before you go

The caves are undeveloped with no lighting or walkways and visits mean scrambling with hand torches. Guides are arranged informally. Vallemi is remote and access is rough. There is little accommodation.

Nearby

Concepcion lies south down the river; the Apa frontier is north.

What to pack for Vallemi Caves

Chosen from what this place is for. Tap a kit for the full checklist.

  • Head torch + spare batteries - Hands-free light is essential; caves are truly dark. Find on Amazon
  • Grippy closed shoes - Cave floors are wet, muddy and slick with formations. Find on Amazon
  • A warm layer - Many caves sit near 10°C year-round, even in a hot country. Find on Amazon
  • Gloves - Protect your hands on rough rock and cold metal handrails. Find on Amazon

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Opening times, ticket prices and seasonal closures change - check the official source before you go: official site.

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