Buenos Aires holds fascinating treasures that aren’t visible to everyone, and every year, you have the opportunity to discover them for free. It’s the perfect opportunity to discover them. From October 5–9, a new Archaeology and Paleontology Week is coming, and with it, a series of free activities to connect with the hidden history of Buenos Aires.
There are plenty of opportunities to discover the city’s hidden and lesser-known corners—the lineup is extensive. But there are two standout experiences that are stealing the spotlight—and if you haven’t tried them yet, don’t miss out on them in 2026.
One of them is a tour of Buenos Aires’ underground tunnels, and the other is an exclusive guided tour of the historic corners of the Santo Domingo Convent.
If you’re passionate about Buenos Aires’ history, urban myths, and archaeological finds that have survived the passage of centuries, Buenos Aires Archaeology Week in 2026 offers you the chance to explore the Zanjón de Granados, the Casa de la Cultura, the Santo Domingo Convent and Michelangelo, the Barraca Peña Archaeological Site, the Cabildo, the Ceci Palace, and many other significant sites.
The tours are free but require advance registration. You can choose your tour and sign up here.
The Underground Tunnels of Buenos Aires: A Link to the Times of the Viceroyalty
One of the must-see tours this year is the one that takes you to explore the legendary colonial tunnels of Buenos Aires. Redesigned and studied by archaeologists, these underground passages date back to the 18th and 19th centuries and once connected churches, convents, and government buildings. If you’ve never been to the tunnels of the Manzana de las Luces, this is your chance.
During your visit, you’ll be able to explore original underground galleries and discover the brick architecture that survived buried beneath Buenos Aires’ modern development, learn about its stories and urban legends, and admire ceramic pieces, everyday utensils, and artifacts unearthed during the excavation work.
The Santo Domingo Convent: Architecture, Cloisters, and Remnants of the Past
The other must-see event on the program is a special tour of one of Buenos Aires’ oldest and most iconic convents: the Convent of Santo Domingo.
On this guided tour, you’ll admirethe colonial cloisters and courtyards that transport you straight back to the days of viceregal Buenos Aires and experience firsthand the hidden archaeological heritage: original structures, ancient cisterns, and water reservoirs that once supplied the religious community.
In addition to these tours, the 12th Archaeology and Paleontology Week features a packed schedule of events, including exhibitions of megafauna fossils found in the Buenos Aires area (such as glyptodonts and mastodons),talks with urban archaeologists, andhands-on workshops.
Choose your favorite spot to explore in Buenos Aires and reserve your spot.
