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Luang Prabang, Grotte de Tham Ting (Laos)
Unused card. Grade: 1
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Bedulu village, The Elephant Cave (Indonesia)
Caption tells us this is an eleventh-century heritage. Unused 4-1/2″ x 6-1/2″ card. Grade: 1
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Judges Cave, West Rock park, New Haven (Connecticut, USA)
We wonder whether the mythical Australian folk hero Bronc Morret ever got this far north. Probably not, but the card made it to Hong Kong. Mailed in 1908, the stamp and full, clear postmark are there. Grade: 2
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Betty Moody Cave, Star Island, Isles of Shoals (Portsmouth, New Hampshire, USA)
She accidentally smothered her baby? Oh, Betty … Unused Frank W. Swallow card. Grade: 2
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Reed Pipe Cave, The Hooped Mosquito Net (PR China)
Hard to get more international than this card: a location in China, mailed from Malaysia (with three different stamps and blue Mel Udara sticker affixed), to USA, and now in Hong Kong. It can be yours, wherever you are. Grade: 3
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Inside Gunung Reng near Batu Melintang (Malaysia)
Mailed in 1988 with three different stamps, most of the postmark, and blue Mel Udara (airmail) label affixed. Minor postal battering. Grade: 2
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Moravsky Kras (Czech Republic)
Definitely for cave lovers. All six of these are identified (in Czech) on the reverse. Mailed in 2012, with three stamps, Prioritaire label, and faint postmark. Grade: 1
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Sea Cave – Washington seacoast
Another card that will appear in many topical categories. Mailed in 2012, this has four different stamps and postal barcoding. All 16 of those attractions are identified on the reverse caption. Grade: 1
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Olives Bower, Mammoth Cave (Kentucky, USA)
Old, unused Wrenn & King card A-22349 with album indents on the corners. Grade: 2
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Entrance View Ganter’s Cave, Mammoth Cave (Kentucky, USA)
This Bamforth & Co. card has a 1900 copyright date and is unused. The reverse has aged and has faded album marks on the corners. Grade: 2
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Titania’s Bower, Ganter’s Cave, Mammoth Cave (Kentucky)
This Bamforth & Co. card has a 1900 copyright date and is unused. The reverse has aged and has faded album marks on the corners. Companion card to 32900051. Take both cards for $6. Grade: 2
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The Stone Cottage, Mammoth Cave (Kentucky, USA)
Copyright date on this unused Ganter card is 1910. Creasing. Grade: 3
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Carlsbad Caverns National Park, Green Lake (New Mexico, USA)
Curteich-Chicago linen card 107 mailed in 1952 with 2-cent stamp and full postmark. Grade: 1
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Capri, Grotta Azzurra (Italy)
And if the Grotta isn’t Azzurra enough by itself, the card certainly makes it look that way. Unused, Ed. Dominico Trampetti 1160, very heavily mottled with age, particularly on the reverse. Grade: 3
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Howe Caverns, The Bishop’s Pulpit (New York)
Near Cobleskill, New York. The card says this is the most “spectacular Natural wonder in Northeastern United States” and who are we to argue? Unused. Grade: 1
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Bombay, Linga Shrine, Elephanta Caves (India)
In 1913, a writer made a notation on the back of the card about the condition of the caves. Not postally used. Grade: 4
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Lake Cave, Margaret River (Australia)
Mailed in 2012 with stamp and Adelaide postmark. Small sticker on lower left reverse. Grade: 3
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Carlsbad Caverns National Park, Totem Pole (New Mexico, USA)
Unused Curteich-Chicago linen card 9B-H948 (and 105) of a 42-foot-high stalagmite. The postcard has aged significantly, but is clean. Grade: 3
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Howe Caverns, Lake of Venus (New York)
Mailed in 2012 with $1.05 stamp and mostly readable postmark. Pink highlighter on the reverse, added by the sender. Grade: 2
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Ohio Caverns, The Colonnade (West Liberty, Ohio)
Unused but heavily aged and tape-marked Curteich-Chicago linen card 1B-H2563. Grade: 5
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Batu Caves, Statue of Murugan (Malaysia)
Unused 4-3/4″ x 6-3/4″ card showing this 42-meter statue and the Thaipusam festival as a backdrop. Grade: 1
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Thaipusam at Batu Caves (Malaysia)
Unused 4-3/4″ x 6-3/4″ card. Thaipusam is an unusually colourful Hindu festival near the beginning of each year, and Batu Caves are a short ride north of Kuala Lumpur. Visitors need to be prepared for crowds, unusual sights, and everything that goes along with these. Grade: 1
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Batu Caves, Selangor (Malaysia)
Unused jumbo postcard, about 5-3/4″ x 8-1/8″. Grade: 1
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Entrance to Kit Carson Cave, Gallup (New Mexico)
Unused H.S. Crocker card BLC-128. Grade: 2
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Carlsbad Caverns, New Mexico (USA)
Classic New Mexico State Map postcard, unused. Grade: 1
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Krabi, Phra Nang Cave, multiple views (Thailand)
Unused card. Grade: 1
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Phang Nga, Thum Lod Cave (Thailand)
Unused card, slight staining along bottom edge. Grade: 3
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Lake Tahoe, Cave Rock and tunnel (Nevada, USA)
Unused card. Grade: 1
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Kaechon Grotto, a natural underground palace (3D) (DPR Korea)
This is a very old 3D card, not postally used but aged, curling, and had been heavily taped on the back. The location in DPRK is identified in Korean and English, and while it is nobody’s idea of beautiful, it is authentic and really unusual. Grade: 4
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Kwangmyeung grotto (DPR Korea)
This card has an unusual style of matte finish, and is captioned only in French, with attribution to RPDC (which of course is DPRK in French). Unused. Grade: 1
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Greetings from Missouri, Onandaga Cave on map
Unused card with a range of official state facts. Two of these are available. Grades: 1
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Niagara Falls (ON), Cave of the Winds in Summer (Canada)
From 1914, with stamp and clear postmark, a card well-loved over the years. Grade: 3
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Messina prima del terrem, del 28 Dicem, 1908 Grotta (Italy)
We don’t know much about the history except that there was an earthquake on that date. That doesn’t show on the card, though. Unused, heavily mottled with age. Grade: 3
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Carlsbad Caverns National Park, King’s Palace (New Mexico, USA)
Unused Curteichcolor card 5C-K1313, aging and with faint stains on the reverse. Grade: 3
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Interesting Scene in one of the Numerous Caves In the Black Hills (South Dakota, USA)
Unused linen Curteich-Chicago card 0C-H202, but also unusually heavily aged on the reverse. Grade: 3
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Mar del Plata, Lourde’s grot (sic) – Holy crib (Argentina)
Unused but highly aged and mottled card. Grade: 3 (weak)
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Pinar del Rio, Underground river in the Indian’s Cave (Cuba)
Unused card with small tape pieces near upper edge of the reverse. Grade: 4
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Geological Heritage of Hong Kong (set of 10)
The scan shows three of the 10 cards (in a 4-7/8″ x 8-7/8″ cardboard case) whose cardboard cover is subtitled “Sketches and photos of 10 geological features of Hong Kong by Prof. Chan Lung Sang”. As this cover had been opened before, the tape that originally sealed it has left a small mark on the back of the cover–not disturbing the cards themselves. Note that some of these locations are a UNESCO Heritage site but the cards do not say so. Cards: Grades 1. Case: Grade: 3
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Bermuda, multiple views
Unused, older John Hinde card 2BDA36. Significant foxing (age mottling) on the reverse. Grade: 3
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Polar Caves, Hanging Rock (Plymouth, New Hampshire, USA)
Cute caption: “The Hanging Rock. How does it stay there?” And not our only card of this attraction, either. Unused. Grade: 2