ProhodnaÃÂ is aÃÂ karstÃÂ cave in north centralÃÂ Bulgaria, located in theÃÂ Iskar GorgeÃÂ near the village ofÃÂ KarlukovoÃÂ inÃÂ Lukovit Municipality,ÃÂ Lovech Province. The cave is known for the two eye-like holes in its ceiling, known as the Eyes of God orÃÂ Oknata. Prohodna is 262m 860ft long, which makes it the longest cave passage in Bulgaria. The cave has two entrances which lie opposite one another, known respectively as the Small Entrance and the Big Entrance. The former is 35m 115ft high and the latter reaches 45m 148ftÃÂ in height. The cave is very popular among the rock climbers.
圖片編號：
103947339
拍攝者：
Ivaylopopdontchev
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| 授權類型 | 尺寸 | 像素 | 格式 | 點數 | |
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| 標準授權 | TIFF | 3537 x 2357 | TIF | 39 | |
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| 進階授權 | PEL | 4243 x 2828 | JPG | 88 | |
| 進階授權 | UEL | 4243 x 2828 | JPG | 88 |
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| 標準授權 | 480 x 320 px | JPG | 13 點 |
| 標準授權 | 800 x 533 px | JPG | 15 點 |
| 標準授權 | 2501 x 1667 px | JPG | 18 點 |
| 標準授權 | 2738 x 1825 px | JPG | 20 點 |
| 標準授權 | 3464 x 2309 px | JPG | 22 點 |
| 標準授權 | 4243 x 2828 px | JPG | 23 點 |
| 標準授權 | 3537 x 2357 px | TIF | 39 點 |
| 進階授權 | 4243 x 2828 px | JPG | 88 點 |
| 進階授權 | 4243 x 2828 px | JPG | 88 點 |
| 進階授權 | 4243 x 2828 px | JPG | 88 點 |
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