Natural monuments around Armallones are found within the Alto Tajo Natural Park, an area known for its diverse ecosystems and unique geological formations. The landscape features deep canyons carved by the Tagus River, showcasing significant geological history. This region provides habitats for diverse flora and numerous birds of prey. Visitors can explore a variety of natural features, from river gorges to caves and viewpoints.
Last updated: July 1, 2026
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This descending valley, which runs alongside the Tagus River for many kilometres, is full of unique and unrepeatable corners, due to the capricious formations that occur every few metres.
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Access to the starting point is via the forest track that begins one kilometer before reaching the San Pedro Bridge, descending from the village of Zaorejas. Then, continue another kilometer along the dirt road to the bend where the Escaleruela waterfall is located, right in the environmental area of the Alto Tajo Natural Park. The best time to visit the waterfall is in spring due to the high water level, the streams are full of water, and the humidity keeps the natural ecosystems at their most vibrant. The route climbs to the right of the waterfall, following a trail marked with milestones for a variant of the GR-113 Tajo Natural Path toward the mountain village of Zaorejas through the Ciño Negro ravine. The main route follows the forest track between Poveda de la Sierra and Villar de Cobeta. The path is carved into the tuff edifice that forms the waterfall block; it has passageways and alleys created by rainwater dissolving the calcium carbonate in the rocks. The path is beautiful; at the top of the tuffaceous block, another waterfall appears over the steps of the path and offers spectacular views of the Ciño Negro towers.
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Beautiful place, surrounded by nature from all angles.
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What a great and interesting area. The rocks, arch, and trail in this area are wonderful for walking or running. At the entrance to the rock arch there is a sign with details and drawings of the limestone rocks.
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The trail reaches a crossroads at the junction of the Fuente Nueva and Arco boulevards and turns left along the bottom of the ravine. The surface is excellent for running and the terrain is favorable. The tracks on the forest track run through the pine forest along the edge of the dry riverbed and reach the natural wonder of Peña del Arco, the stellar spot for the trail through an arch of calcareous rock that cross the ravine from side to side. There are also limestone walls, small passageways, loose blocks and tormos, which are the characteristic mushroom-shaped karst formations sculpted by dissolving water. The lower part of the stone tower is usually narrower than the upper part because it has suffered a greater incidence of erosion due to humidity and water currents. At the entrance to the rock arch there is a sign with details and drawings of the karstic modeling of the limestone rocks.
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This section of the well-known "Montañas vacías" bikepacking route runs along the banks of the Tagus River through an incomparable landscape setting. Beautiful views in every corner of the river and the impressive gorges that it has formed over thousands of years. A unique and incomparable place.
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in pursuit of the tajo a magnificent track
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a walk not to be missed
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The Armallones area, nestled within the Alto Tajo Natural Park, offers a variety of unique natural features. You can explore the dramatic Trail along the Tajo River, which winds through impressive gorges carved by the Tagus. Another highlight is the spectacular Hundido de Armallones, a deep canyon with large rock formations and a natural turquoise-water pool. Don't miss the seasonal Escaleruela Waterfall, especially vibrant in spring.
The Hundido de Armallones is celebrated for its breathtaking beauty and geological significance. It features a deep canyon carved by the Tagus River, revealing ancient geological strata and an overturned fold. Visitors can enjoy a relatively easy hiking route with spectacular aerial views, leading down to an emerald natural pool perfect for swimming. It's also an excellent spot for nature observation, especially birdwatching, with numerous birds of prey nesting on its cliffs.
Yes, the region offers a couple of notable cave experiences. You can visit the Sima de Alcorón Cave, which is accessible and located near a forest refuge. Another intriguing site is the Covacha de las Grajas, a large cave-shelter near Llano La Muela, featuring stalactites and stalagmites. Historically used for livestock, it now provides shelter for wild animals, offering an adventurous visit.
For expansive panoramic views, the Mirador de Llano La Muela is an excellent choice, offering unique vistas of the Tagus valley and the Hundido de Armallones. You can often observe vultures soaring at eye level from this viewpoint. Additionally, the Tajo River Suspension Bridge provides great views of the Tagus River and its surroundings, while Peña del Arco offers a unique perspective of rock formations and the surrounding nature.
Armallones is a fantastic destination for hiking. You can find a variety of trails, including moderate options like the Pico del Alar – circular by Salinas de la Inesperada from Ocentejo, or the Camino de la Escaleruela a Cascada de la Escaleruela. For a more challenging experience, consider the Hundido de Armallones Loop. Many of these routes are part of the Alto Tajo Natural Park. You can find more details and routes in the Hiking around Armallones guide.
Absolutely! The area around Armallones offers excellent opportunities for both road cycling and mountain biking. Road cyclists can explore routes like the Alto Tajo and Arbeteta Castle Loop or the Peñalén – Hoz de Beteta loop. For mountain bikers, trails such as La Hoz Somera and Los Castillejos or the Hundido de Armallones circular route provide thrilling experiences. Discover more cycling options in the Road Cycling Routes around Armallones and MTB Trails around Armallones guides.
The best time to visit largely depends on your interests. Spring is ideal for seeing the Ojos de la Cárquima seasonal waterfalls and the Escaleruela Waterfall at their fullest, and for enjoying the vibrant natural ecosystems. Warmer months are perfect for swimming in the natural pool at Hundido de Armallones. However, note that access to Ojos de la Cárquima is restricted between February 1st and June 15th due to raptor nesting season.
Many natural monuments in Armallones can be enjoyed by families. The Hundido de Armallones offers a relatively easy hiking route that leads to a natural pool, which can be a refreshing activity for families during warmer months. Exploring the accessible Sima de Alcorón Cave can also be an exciting adventure for children. The Tajo River Suspension Bridge provides a pleasant walk along the river suitable for various outdoor activities with family.
The natural monuments area, particularly the Hundido de Armallones, is rich in wildlife. The cliffs provide nesting habitats for numerous rupicolous birds of prey, including Bonelli's eagle, Egyptian vulture, griffon vulture, and peregrine falcon. Forest raptors like goshawks and sparrowhawks are also present. You might also spot deer and wild boar. Along the riverbanks, otters, kingfishers, and common trout thrive in the gallery forests.
Yes, the region features several notable water sources. The Refugio de la Fuente de la Loca, located within the Hundido de Armallones, is known for its spring that usually provides abundant potable water. Another example is the Fuente del Espinar, a representative spring with a carved stone vault covering the water source and a traditional stone-paved wash house, showcasing historical water management.
Visitors to the Trail along the Tajo River are captivated by its unique and ever-changing landscapes. The trail runs alongside the Tagus River, offering beautiful views at every turn and showcasing impressive gorges formed over thousands of years. It's praised for its 'capricious formations' and is a section of the well-known 'Montañas vacías' bikepacking route, making it a favorite for both hikers and cyclists seeking incomparable natural beauty.
The Escaleruela Waterfall is a stunning natural monument, especially vibrant in spring when water levels are high. It's unique because the path is carved into the tuff edifice that forms the waterfall block, featuring passageways and alleys created by rainwater. At the top, another waterfall appears over the steps, offering spectacular views of the Ciño Negro towers. It's a beautiful place where the natural landscape and the trail merge into one.


Extend your search for the best caves by checking out these guides of the top ones around Armallones: