These are the 30 oldest caches in the world, that has yet to be found. I only counted regular caches and multi caches, not ghost caches or any other sort. I haven't checked it, but I believe one of the Estonian caches would be closest to my home in Norway. Which one is closest you you?
Cache name - Country - Date of placing (dd.mm.yy)
Oh so blue - Belize - 06.01.01
All Saints - Mexico - 26.05.01
Piibe stash - Estonia - 16.06.01
Arekuna - Venezuela - 20.06.01
4.5lb Walleye - Ontario, Canada - 23.06.01
Reclusion - French Guiana - 23.06.01
Kougarok - Alaska, USA - 23.06.01
Conch Shell Horn - Venezuela - 10.07.01
Ghost Fisherman's Cabin - Ontario, Canada - 12.07.01
Yankee/Doctor Bay Cache - Northwest T, Canada - 13.07.01
LU7JCN - Argentina - 15.07.01
Cliff Cache - Northwest T, Canada - 15.07.01
Flagajokull ~ Wedge Glacier - Iceland - 21.07.01
Bouncing Around Heimay - Iceland - 24.07.01
Island Suprise - Ontario, Canada - 27.07.01
Nikolay-Kam - Russia - 28.07.01
St. Louis-Legacy - St Vince Grenadines - 03.08.01
Points West - Ireland - 05.08.01
Runö - Estonia - 09.08.01
Mount Temple - Alberta, Canada - 12.08.01
freissinieres - France - 17.08.01
The Pipeline - Quebec, Canada - 02.09.01
Mad Dragons' Cache - China - 02.09.01
Devil's Dancefloor - California, USA - 03.09.01
Riddle stash - Estonia - 22.09.01
Underwater stash - Estonia - 22.09.01
Eastern stash - Estonia - 05.10.01
S.Giovanni - Italy - 14.10.01
Pljesevica - Bosnia and Herzegovina - 27.10.01
Cachemon #2 [sP] - Brazil - 14.11.01