콜라 델 엠발스 드 보노스 주변 최고의 교통량 없는 자전거 라이딩 코스

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Railroad tunnel No. 25 of the Sierra Greenway Nature Trail. Located 1,670 meters from the previous tunnel, it is 500 meters long and equipped with artificial lighting, although it is advisable to have a flashlight. This tunnel is dug into the limestone slope of the Cerro de los Borregales or Castellar de Jalifa. The castellares are hills with a limestone plateau at the top, raised on a base of softer materials, in this case Triassic clay and sandstone, which give them the appearance of a fortress. At the top of this hill are the remains of an old watchtower from the Spanish-Islamic period.

Viaduct of 65 meters long, built by means of truncated-pyramidal pilasters with a rectangular plan with mortared bluestones. Formed by the repetition of 3 equal spans. Built to save the bed of the Azar stream. Less than 100 meters away there is a small rest area from where you have a good view of the Guadalete river at the exit of the Villalón meander, at the foot of the Cerro del Castellar.

Railroad tunnel No. 28 of the Sierra Greenway Nature Trail. Located 1,031 meters from the previous tunnel, it is 87 meters long and not equipped with artificial light, so it is advisable to have a flashlight. This tunnel was dug from clay and sandstone. The tunnels of this section of the railway were built by means of shoring (fastening of the excavation) based on props and wooden beams to later form the concrete of the slab that supports the tunnel. The mouth of the tunnel is finished with sculpted limestone from a quarry for Zaframagón.

Rail tunnel No. 29 of the Sierra Greenway Nature Trail. Located 2,270 meters from the previous tunnel, it is 67 meters long and is not equipped with artificial light, so it is advisable to have a flashlight. This tunnel was dug from clay and gypsum. The tunnels of this section of the railway were built by means of shoring (fixing the excavation) based on props and wooden beams to later form the concreting of the slab that supports the tunnel. The mouth of the tunnel is finished with sculpted limestone from a quarry for Zaframagón.

The Guadalete is a river in the south of Spain, in the region of Andalusia. The river rises near Grazalema (near the Peñón Grande) and flows 157 kilometres further on in El Puerto de Santa María, in the Gulf of Cádiz, into the Atlantic Ocean.

Puerto Serrano is a farming village located in a rolling rural area at the northwestern edge of the Sierra de Cádiz mountains. The town is situated just off the highway from Seville to Ronda, near the border with the province of Seville, but is easily overlooked by those heading to either city. Puerto Serrano, modern in appearance and with a population of about 7,000, is located near the Guadalete River and, to the south, a hill called Picacho.