Arroyo Seco

Located in the northernmost tip of the state, bordering San Luis Potosí, Arroyo Seco is one of the best-kept and most fascinating secrets within the Sierra Gorda Biosphere Reserve. Despite its literal name ("Dry Creek"), this municipality thrives as a rich oasis of water and greenery, blessed by the flow of major regional rivers like the Ayutla and Santa María. It stands as the ultimate destination for true explorers looking to connect deeply with untouched nature, practice high-energy hiking, cool off in pristine natural pools, and marvel at the region's historical Baroque architecture.

What awaits you?

• The Stunning Confluence of Rivers (Las Adjuntas): Witness the exact, spectacular spot where the Ayutla River and the Santa María River meet. This unique visual phenomenon allows you to see the contrasting temperatures and colors of both currents (one rushing cold and bright blue, the other warm and sandy-toned) blending together.

• The Concá Franciscan Mission & Springs: Admire the beautiful Mission of San Miguel Concá, the most intimate of the UNESCO World Heritage missions in the Sierra Gorda, famous for its facade packed with unique indigenous-mestizo symbols. Nearby, take a dip in "La Alberca de Concá," a thermal water spring guarded by massive, ancient trees.

• Sótano de Barro & Extreme Ecotourism: For true thrill-seekers, the rugged outskirts offer access to colossal landmarks like the Sótano de Barro—a massive, deep vertical abyss surrounded by dense forest canopy that serves as a vital sanctuary for the endangered military macaw, perfect for landscape photography and sustainable exploration.