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lopho: _MG_3060
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lopho: _MG_3061
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lopho: _MG_3074
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lopho: _MG_3091
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lopho: Smooth sandstone ceiling
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lopho: _MG_3120
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lopho: Flowstone formation in Frozen Niagara
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lopho: Flowstone formation in Frozen Niagara
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lopho: Flowstone formation in Frozen Niagara
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lopho: Algae growing in artificial light
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lopho: Cave Dwellers
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lopho: Mikhail and Tita
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lopho: Mammoth Cave Historic Entrance
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lopho: _MG_3238
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lopho: _MG_3243
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lopho: _MG_3259
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lopho: _MG_3267
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lopho: _MG_3271
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lopho: _MG_3274
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lopho: Tita and Mikhail
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lopho: _MG_3280
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lopho: _MG_3284
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lopho: _MG_3285
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lopho: _MG_3292
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lopho: _MG_3300
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lopho: _MG_3304
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lopho: _MG_3307
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lopho: _MG_3310
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lopho: _MG_3311
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lopho: _MG_3313