visiting the trass caves at Brohltal valley at Eifel region in Germany. mining area of volcanic rock in roman times.
ID: 1177660840
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- 大图:2451 × 1634 像素·20.75 cm × 13.83 cm·300dpi·JPG
- 中图:1000 × 667 像素·35.28 cm × 23.53 cm·72dpi·JPG
- 小图:500 × 334 像素·17.64 cm × 11.78 cm·72dpi·JPG