Why collect?
• Links to transport, history, and geology.
• A fascinating diverse thematic.
• Opportunity to focus in on numerous sub-themes.
• Regular issues make this an ever-expanding collection.
Five notable releases
• 1968 & 2019, France, Lascaux Caves.
• 1989, GB, tin mine at St Agnes Head, Cornwall.
• 2016, Guinea Bissau, New York Subway.
• 2021, GB, Portland cement (for sewer and tunnel construction).
• 2023, France, Paris catacombs.
Expand the theme
With a thematic this large, try narrowing the theme rather than expanding it further. Focussing in on one aspect of subterranea, such as subways, still offers plenty to explore.
Collecting links
The Free Stamp Catalogue is a wonderful resource which allows viewers to search on keywords such as subways, underground constructions, or underground engineering, to…
