Cave Stamps, Underground Spaces, Caving, Speleology, Caves

Kosovo
Caves
November 15, 2011
The stamp set features views of Gadime Cave, a Mesozoic limestone cave in southern Kosovo.

Aruba
Caves of Aruba
April 1, 2009
Guadirikiri Caves are located at the base of a limestone terrace near the southeastern coast of the island of Aruba. The caves feature stalactites and stalagmites, with some chambers receiving nature light through their ceilings.

Poland
Poland See More
June 27, 2025
Set of two, one stamp features Bear Cave in Kletno. The limestone cave has a length of over 2 km and is the longest cave in the Sudeten mountain range.

Saudi Arabia
Caves of Saudi Arabia
September 2019
Set of six, one stamp depicts Black Scorpion Cave in the Northern Borders region.

Aruba
Caves of Aruba
April 1, 2009
Fontein Cave is located in the Arikok National Park, near the southeastern coastline of the island. The cave is known for its karstification features and large population of algae and bats.

The Dachstein Giant Ice Cave in Upper Austria.

Austria Scott 1351 1987

Under Mount Peca by train, on foot, by bike, and by kayak

The lead and zinc mine, which ceased operations in 1993, has since been transformed into a unique tourist attraction.
Visitors begin their journey aboard a train that travels 3.5 kilometers into the depths of the mine.
From there, the adventure continues on foot, exploring the underground passages.
For a more active experience, tourists can cycle through the mine shafts or paddle kayaks through sections that have naturally filled with crystal-clear water over the years.

120th Anniversary of the Postojna Cave Railway (post card)

The Postojna Cave railway, first opened in 1872, is the oldest underground cave railway in the world. Originally, cave guides manually pushed small carriages along the tracks to transport visitors through the horizontal passages. In 1924, the system was modernized with a gasoline-powered locomotive named Montania, dramatically increasing capacity and efficiency. Today, the electric cave train carries tourists through nearly 4 kilometers of stunning karst formations, making it one of Slovenia's most iconic attractions.
On postmark is Proteus anguinus, see post:
https://goscf.com/t/18523&whichpage=5#359026

Kosovo
Natural Monument - Caves
June 18, 2025
Hoxha Cave is located above the village of Vrellë in Istog, within the Mokna mountain range. The cave preserves evidence of continuous human habitation since prehistoric time. The cave is also known for its stalactites, stalagmites, and an internal lake.

Kosovo
Natural Monument - Caves
June 18, 2025
Gryka e Madhe is one of the largest limestone caves in the Rugova Gorge in western Kosovo. It is a significant speleological and tourist attraction in the Balkans.