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Mammoth Cave National Park, historic entrance (Kentucky, USA)
Unused H.S. Crocker card DT-40109-D (NPC-6-D). A name and 1986 date are written at the postage area. Grade: 3
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Chattanooga, Lookout Mountain Caverns, Ruby Falls (Tennessee, USA)
Unused, older card 13762. Grade: 1
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Mammoth Cave National Park, Lake Lethe (Kentucky, USA)
Unused H.S. Crocker card NPC-26. Grade: 1
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Hellertown, The Long Bridge (Pennsylvania, USA)
Unused Plastichrome card K-12185, slight staining on the reverse. If you have any connection with “Lost,” you will appreciate the card’s caption: “The Long Bridge–about 100 ft. in length crosses the Lost Lake and over the Lost River leading into the New Room in Lost River Caverns …” We suppose, not lost any more. Grade: 2
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Blue Mounds, Cave of the Mounds, Rare Black and White Ribbons above Frozen Waterfall (Wisconsin, USA)
Unused, aged, linen Curteich-Chicago card 7B-H111. Forgive us if the scan is pointing in the wrong direction but we’ve no idea which end is up. (Sometimes that applies to life, too.) Grade: 2
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Park City, Park Mammoth Resort, Jesse James Cave (Kentucky, USA)
We looked up the (underlying) resort, and it’s still there, but with decidedly mixed reviews. Presumably nobody will say the caves are in need of renovation! Unused Tichnor Bros. card K-13099. Grade: 1
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Rumney, Polar Caves (New Hampshire, USA)
Actually the caption doesn’t mention Rumney, and just says “near Plymouth”. We looked it up. You can thank us later. (!) Unused card. Grade: 1
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Amalfi – Grotta dello Smeraldo (Italy)
Unused real-photo card with a major crease through the upper left corner. Grade: 4
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Multiple views (Pitcairn Island)
… and these views include Big Pool at St Pauls, Down Rope, Christians Cave, and The Landing. Unused official card from 2002. Grade: 1
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Multiple views – Christian’s Cave (Pitcairn Islands)
The three items on this unused, official card from 2007 include Fletcher Christian, Christian’s Cave, and the hibiscus flower. Grade: 1
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Postojnska Jama (Slovenia)
Unused Sidarta card A0171 of a cave that opened for visitors in 1819. Grade: 1
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Santa Cruz Zambales, Sagrada Familia Cave (Philippines)
Busy on Good Friday! Unused 2002 card. Grade: 1
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Okinawa, Cave of Former Japanese Navy Headquarters (Japan)
From a series of unused cards, captioned mostly in Japanese and Chinese, but with the key identification also in English (or we should say western letters). Grade: 1
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Përshëndetje nga Kosova (Greetings from Kosovo) – Marble Cave
We sometimes observe that one postcard fits many of our theme categories. This is one of those. Bilingual Albanian/English captions identify Kosovo National Park “Sharr Mountains”, Brezna Lake close Koritnik Mountain; Marble Cave (Lipjan); Mirusha Waterfall (Llapusha); Badovc Lake (Prishtina); National Park “Accursed Mountains”; Kucishta Lake; and a Sharr dog in the center. That should keep the search engines busy. Unused. Grade: 1
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Kailasa Temple, Ellora Caves (India)
Not postally used, but with a message written on the reverse. A UNESCO site. Grade: 4
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Mulu National Park, King Room, Wind Cave (Sarawak, East Malaysia)
We apologise if this card winds up upside down, but we really can’t tell which way is up. Unused Crystal card CPC-014, 5″ x 7″, Grade: 1
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Gunung Mulu National Park, Wind Cave, King’s Room (Sarawak, East Malaysia)
“Fantastic limestone formations” in the Gunung Mulu National Park. Unused card 741 from the Association for Intellectually Disabled Children’s “Scenes of Sarawak” series. Grade: 1
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Mercer Caverns (Murphys, California)
Unused Mike Roberts cave postcard whose caption tells you more than we could: “Soda straw stalactites located in the Cathedral Room along with the ‘Slab of Bacon'”. Knowing that stalagmites go up and stalactites go down, we think this card is pointing in the right direction. Left serrated edge. Grade: 1
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Mercer Caverns, Simon’s Thumb (Murphys, California)
Unused Mike Roberts card C18457 of “a beautiful stalagmite rising from a projecting white slab of limestone”. Perforated upper edge means the card had been part of a set. Flip this card around and it could easily have been labelled as a different part of Simon. Grade: 1
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Salt Petre Cave, natural bridge (Virginia, USA)
This unused Tichnor Bros. Lusterchrome card K-7792 has a sparse caption that only mentions Virginia, so we dug deeper (sorry!) and everything Google turned up was in Kentucky. Adding “Virginia” to the search bar only informed us that Virginia has many such caves — so we can assume that the caption writer, like us, just gave up. Nice card, though. Grade: 1
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Maquoketa Caves State Park, 17 Ton Balanced Rock (Iowa, USA)
Unused but with significant staining on the reverse. Grade: 4
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Batu Caves, Lord Murugan (Malaysia)
Mailed a few years ago, with large stamp, obscured postmark, and blue bilingual Mel Udara label. Grade: 1
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Parcul Național Munții Rodnei (Romania)
Because everything on both sides of this unused card is only in Romanian, and because it’s quite a “busy” card, we will just venture that this is the national park (Parcul Național Munții Rodnei) and based on the identifying captions on the reverse, the largest view is a cave (Pesterea Izvorul Albastru al Izei, or Iza Blue Spring Cave) inside the park. You can let us know if we’re wrong. But overall this is a superb postcard. Grade: 1
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Cave of the Stone Sepulchre (Belize)
Also known as Actun Tunichil Muknal, on this unused card. Known locally as ATM, it’s a cave in Belize, near San Ignacio, Cayo District, notable as a Maya archaeological site that includes skeletons, ceramics, and stoneware. There are several areas with skeletal remains in the main chamber. Grade: 1
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Peştera Urşilor (Romania)
Peştera Urşilor (Bear’s Cave) is located in the western Apuseni Mountains, on the outskirts of Chișcău village, Bihor County. It was discovered in 1975 by Speodava, a spelaeologist group. Bears’ Cave received its name after the 140 cave bear skeletons which were discovered on the site in 1983. This unused card measures 4″ x 8-1/2″ and is mostly promoting tours in Transylvania. Grade: 1
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St. Michael’s Cave (Gibraltar)
Unused Estoril card 28. Grade: 1
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Kuala Lumpur, Batu Caves (Malaysia)
“Daily visited by sightseers” (a massive understatement, particularly during the Thaipusam festival), Batu Caves may be one of KL’s primary tourist attractions as well as a deeply religious site for Hindus. Unused “Colourful Malaya” card SL-615 (22675) with a bit of age foxing on the reverse. Grade: 2
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Cheddar, Cox’s Cave, The Marble Curtain (England)
See our description for 2016548T. This is unused Photochrom card 76552. Grade: 1
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Cheddar, Cox’s Cave, The Mace (England)
See our description for 2016548T. This is unused Photochrom card 85059. Grade: 2
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Cheddar, Cox’s Cave, The Third Chamber (England)
See our description for 2016548T (England). This is unused Photochrom card 85056. Grade: 3
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Cheddar, Cox’s Cave, The Pagoda (England)
See our description for 2016548T (England). This is unused Photochrom card 85057. Grade: 2
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Județul Buzău, multiple views (Romania)
These four views are bilingually (Romanian, English) identified in the caption: Mânzălești salt mountain, Aluniș Cave, muddy volcanoes, and Buzău’s Municipal Palace. An eclectic selection. Unused postcard, Grade: 1
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Mogao Grottoes (Maximum Cards) (Set of 4) (PR China)
From Wikipedia (edited): “The Mogao Caves, also known as the Thousand Buddha Grottoes, form a system of 500 temples, 25 km (16 mi) southeast of the center of Dunhuang, on the Silk Road, in Gansu province. The caves may also be known as the Dunhuang Caves; however, this term is also used as a collective term to include other Buddhist cave sites in and around that area, such as the Western Thousand Buddha Caves, Eastern Thousand Buddha Caves, Yulin Caves, and Five Temple Caves. The caves contain some of the finest examples of Buddhist art, spanning a period of 2,000 years.” Our scan shows parts of the four cards, issued by China National Philatelic in 2024 as set MC-140, and the cardboard cover. Grade: 1