In this guide
Vallemí is not a day trip from Asunción: it is about 590 km and roughly 9 hours by car (Última Hora, 2024 (opens in a new tab)), and the caves can only be visited with a booked local guide. The realistic plan is three days and two nights: reach Concepción and sleep there on day one, drive up to Vallemí for your booked cave on day two, and add the river or a second cave on day three before heading back.
Why do you need an overnight stop?
- Distance. The fastest road from Asunción to Concepción is PY09 through the Chaco (Wikipedia (opens in a new tab)); by bus it takes about 6 hours (Wikivoyage (opens in a new tab)). From Concepción to Vallemí there are about 175 km more, around two and a half hours by car (Rome2Rio (opens in a new tab); Wikivoyage (opens in a new tab)).
- Caves run on a schedule. Santa Caverna, Caverna 54 and Kamba Hópo are protected areas under Law 4577/12, on land owned by the state cement company (INC), and you can only enter with registered local guides (Última Hora, 2024 (opens in a new tab)). Arrive in the afternoon after nine hours on the road and the day is gone.
- Heat. Summer highs reach about 40 °C (Wikipedia (opens in a new tab)), so caves and the boat trip belong in the morning.
How do you get there? Three options
- By car. Take PY09 to Concepción, then the paved PY22, which runs through Vallemí and on to San Lázaro (ABC Color, 2021 (opens in a new tab)). The whole route from Asunción is paved, with three toll booths (Última Hora, 2024 (opens in a new tab)). Fill up in Concepción.
- By bus. Buses from Asunción to Concepción leave every 1.5 to 2 hours between 5:00 and 23:15, according to Wikivoyage (opens in a new tab). From Concepción, several companies run the PY22 stretch to Vallemí (ABC Color, 2021 (opens in a new tab)). Ask for times at the Concepción terminal the evening you arrive.
- By plane. SETAM, the Paraguayan Air Force's passenger service, flies once a week, early on Wednesdays, from Asunción with stops in Concepción, Vallemí and Fuerte Olimpo (Eco Pantanal/WWF guide, 2025 (opens in a new tab); InfoNegocios (opens in a new tab)). The 2025 guide listed ₲ 400,000, with booking 15 days ahead and payment at SETAM's offices. With no other flight until the following week, most people return by bus.
Cargo and passenger boats also go up the river from Concepción once a week, stopping at Vallemí (Eco Pantanal/WWF guide, 2025 (opens in a new tab)). It is a slow trip, only for travellers with days to spare.
A three-day plan by road
Day 1: Asunción to Concepción. Leave early to arrive in daylight. In the evening, watch the sunset from the Puerto Antiguo pier, facing Chaco'i island (ABC Color, 2023 (opens in a new tab)), and walk Avenida Pinedo with its open-air museum of old machinery (ABC Color, 2023 (opens in a new tab)). For more in town, see things to do in Concepción.
Day 2: Concepción to Vallemí and your booked cave. Leave at 6 on PY22 and meet your guide at Tres Cerros, the usual meeting point (Última Hora, 2024 (opens in a new tab)). Do the main cave in the morning and, late in the day, go up to the Vallemí lookout for views over the river, the forest and the cement works (Última Hora, 2024 (opens in a new tab)). Sleep in Vallemí: the Ruta del Gua'a ecotourism project works with local guesthouses (La Nación, 2024 (opens in a new tab)); ask your guide for a recommendation when you book.
Day 3: river or second cave, then home. Early on, take the boat to Kamba Hópo, a rock face more than 40 metres high above the Paraguay River that can only be reached by water; the trip from the port takes an hour there and back (Última Hora, 2024 (opens in a new tab); InfoNegocios, 2024 (opens in a new tab)). Head off before noon: sleep in Concepción again, or drive straight through if two people share the wheel.
Which cave should you book if you only do one?
- With children or older travellers: 14 de Julio, in Tres Cerros, the easiest to access; about 40 minutes (ABC Color, 2021 (opens in a new tab); InfoNegocios, 2024 (opens in a new tab)).
- For natural-light photos: Caverna 54, with fig-tree roots over 20 metres long hanging from above; about 40 minutes (Última Hora, 2024 (opens in a new tab); InfoNegocios, 2024 (opens in a new tab)).
- For the famous one: Santa Caverna, about 2 hours inside, with ladders and stretches where you crawl (Última Hora, 2024 (opens in a new tab); InfoNegocios, 2024 (opens in a new tab)). Not suitable during pregnancy or if you are claustrophobic (ABC Color, 2021 (opens in a new tab)).
Each cave is described in detail in our guide to things to do in Vallemí.
When to go and what to bring
- Season: heavy rain falls from November to January and the driest months are June to September (Wikipedia (opens in a new tab)). In the wet season, parts of the caves flood and close (La Nación, 2026 (opens in a new tab)). Holy Week is a date tourism officials recommend (same source).
- Booking: more than 100 young people work as guides in Vallemí (La Nación, 2024 (opens in a new tab)), and there are guides certified by Senatur, the national tourism office (La Nación, 2026 (opens in a new tab)). Find them on social media and fix the day and time before leaving Asunción.
- Gear: helmet and torch, comfortable clothes and shoes, water, sunscreen and any medication you need (InfoNegocios, 2024 (opens in a new tab)). Inside the caves, no flash and touch nothing (La Nación, 2026 (opens in a new tab)).
FAQ
Can you visit Vallemí as a day trip from Asunción?
No. It is about 590 km and 9 hours by car each way; plan to sleep in Concepción on the way up and at least one night in Vallemí.
How far is Vallemí from Concepción?
About 175 km on the paved PY22, roughly two and a half hours by car. Buses also run from Concepción's terminal.
Are there flights to Vallemí?
SETAM, run by the Air Force, flies once a week on Wednesdays from Asunción with a stop in Vallemí. Book ahead; most people come back by bus.
Do you need to book the caves?
Yes. They are protected areas and you can only enter with registered local guides, so fix the day and time before you set off.
