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gptkb:Mount_Erta_Ale
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volcanoes with persistent lava lake
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gptkb:The_Hippodrome_Circus
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purpose-built permanent circuses in Britain
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gptkb:Zhaori_Hot_Springs
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seawater hot springs in the world
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gptkb:Avro_Vulcan_XM655
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one of three taxiable Avro Vulcans
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gptkb:Macdonald_Stradivarius
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Stradivari violas
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gptkb:Lake_DeFuniak
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nearly perfectly round natural lakes in the world
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gptkb:Reedham_Ferry
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vehicle ferries in Norfolk
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gptkb:SS_Jeremiah_O'Brien
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Liberty ships still operational
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gptkb:Graue_Mill_and_Museum
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operating water-powered gristmills in Illinois
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gptkb:Shipki_La
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open border posts for trade between India and China
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