![](http://www.alamy.com/thumbs/6/458B913E-65A5-48C0-A46B-4A47D81E5411/2CFHX4N.jpg)
ancient handmade tunnel dug in limestone rocks in Cheile Nerei
Size: 3600px × 2400px
Photo credit: © coroiu octavian / Alamy / Afripics
License: Royalty Free
Model Released: No
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