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Railroad tunnel at Natural Tunnel State Park in the Appalachian Mountains of Virginia.
a light at the end of the tunnel
People driving car in tunnel
Rock Tunnel on Sylvan Lake Trails in Custer State Park, Black Hills Country, South Dakota, USA
A quiet, lonely tunnel that opens onto the lovely and vivid scenery of Southern Norway.
Driving Towards The Road Tunnel Entrance
pedestrian access tunnel to the Faial caldera of the Azores archipelago
The Natural Bridge - Rockbridge County Virginia State Park Trail - Close Up
The narrow pass road MA-2141 to Sa Calobra village leads through a dangerous bottleneck at the famous high cliff gap Sa Bretxa rock gate in the mountain range of Serra de Tramuntana at Mallorca.
A woman hiker is hiking along a ridge with her dog surrounded by stunning mountainous landscape
Entrance into a road tunnel is captured in Norway on a summer day. The road in the tunnel is illuminated and is surrounded by concrete blocks.
Empty tunnel with yellow light and traffic sign
Taroko National Park, famous for its spectacular mountains and marble canyons.  The waterfalls characterized Taroko National Park. Hualien County, Taiwan
Wulong karst formations in China.
Levada from Ribeiro Frio to Portela, irrigation canal on Madeira island, Portugal
Tirana, Albania. 13 March 2024. Exterior sign and entrance for Bunk Art 1 in Tirana.
This picture shows the landscape of the Pyrenees in the summer of August 2014.
Highway tunnel with its end visible
The Cueva Palombeira, excavated vertically through the hill that presses against the gorge of La Balouta (in Las M dulas, Le n, Spain), is an artificial tunnel constructed for the evacuation of waste material from the gold mine of Las M dulas. Upon entering a few meters into the cavity, one becomes aware of a tunnel cleanly sculpted into the rock, running along the upper part of the cavern, with vertical walls and an arched ceiling. In contrast, the rest of the cavity is a narrow incision with irregular walls, exposing the structure of an ancient fossilized karst gallery. After the construction of the tunnel during the Roman exploitation period of Las M dulas, the continuous flow of mud and waste materials eroded the initial floor, carrying away the weaker materials that sealed the gallery. These materials consisted of alluvial conglomerates. As a result, the tunnel s exit is located at the highest point of a vast cone of debris that fills the La Balouta ravine and reaches the site of Salas de la Ribera, a locality directly built upon the waste materials from Las M dulas.
Outdoor in autumn
Entrance to a tunnel on a Spanish highway. Car driving by the righ channel.
Tunnels on freeway
Entrance opening hole of dark black natural water tunnel at Broken River Cave Stream Reserve, Canterbury South Island New Zealand
An old abandoned mine located near the Salmon Glacier in northern British Columbia.
It is under the mountain in nature in Japan.
An old tomb carved in the rock at Tharros, a Punic and Byzantine archaeology site in Capo San Marco. San Giovanni di Sinis. Cabras Municipality. Province of Oristano. Sardinia. Italy.
Site excavated by slaves during the gold cycle in Congonhas MG
This rock formation in the Valley of Fire near Las Vegas in Nevada is shaped like an elephant. Seen a hot summer day in the desert.
Free Images: "bestof:The mouth of a huge tunnel which runs back in the earth over one half mile. - NARA - 298387.tif Scope and content Camp DG 4 is located one mile southwest of"
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