| 1. | Nearby this section of Powell Mountain is Virginia's Natural Tunnel State Park.
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| 2. | It is known for its characteristic hole, or natural tunnel, through its center.
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| 3. | Rubio has beautiful natural tunnels called La Cueva de los Miagros.
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| 4. | Gua Puteri is a natural tunnel which pierces Bukit Kajang.
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| 5. | A railroad was constructed through the natural tunnel in 1893.
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| 6. | The terrain contains various karstic features such as caves, natural tunnels, waterfalls, and glacial lakes.
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| 7. | A narrow neck of rock, with a natural tunnel through it, joins the two parts.
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| 8. | The Afghans also used natural tunnels and built others in the mountains, drilling into the rock.
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| 9. | The single-track trail offers a steady, relatively easy grade, trickling streams and natural tunnels of overhanging trees.
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| 10. | In 1899, the Natural tunnel was purchased by the Tennessee & Carolina & Iron and Steel Company.
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