Maps
I hadn't thought of myself as a collector, but then I noticed how many different maps I have. I still have a Michelin map of Africa from the 1970s when I worked there.
Atlas Obscura Maps
Atlas Obscura is a website and set of publications about unusual places around the world. It's not surprising that their collections include unusual maps.
Mapping City Smells
Christmas Maps
World Maps
Mercator Projections
It's amazing how many places you can find world maps with Mercator projection... I'm waiting for the version done with tea leaves...
The cow sculpture is my photo; I've seen this cow twice now at exhibits in Chicago USA and Edinburgh Scotland.
Horoscope of Projections
But Mercator's just one of many map projections.
Specialty Maps
Links Map
Here's another xkcd cartoon -- linked muffins, money, vehicles, appliances, news clippings, all kinds of stuff...
Rail and Tunnel Maps
Nautical Charts
Weather Charts
Ancient Maps
Climate Relief Map of the US - 1900
The Cassini Map of France - 1700s
So began one of the greatest feats in the history of map-making. The map took more than 50 years to complete and involved four generations of the Cassini family. The resulting work—now known as the Cassini map—consists of 180 plates showing the country at a level of detail that was unprecedented then and is still admired today." The dramatic story can be found in chapter 9 of the book, A History of the World in Twelve Maps, by Jerry Brotton (2012).
The complete, digitally restored map can be browsed by clicking this link: https://www.geoportail.gouv.fr/carte and searching on "Carte de Cassini" in the map search (may not work on a phone or tablet; if not, use a laptop or desktop browser)
Andreas Cellarius - 1600s
Cellarius rendered numerous fanciful drawings of the accepted cosmology in early 1600s, for instance these from Harmonia Macrocosmica of Andreas Cellarius
https://www.staff.science.uu.nl/~gent0113/cellarius/cellarius_plates.htm
Oldest Maps - to 6200 BC
Here is a set of the oldest maps I could find easily (6200 BC to 400 AD)
Credits: Siebold, Jim; Index of Cartographic Images illustrating maps from the Ancient Period: 6,200 B.C. to 400 A.D. -- Ancient Maps, April 1998. http://www.henry-davis.com/MAPS/AncientWebPages/AncientL.htmlhttp://phoenicia.org/imgs/maps/pages/1ancientmapscombo.htm