NOTE: The cache is NOT at the posted coordinates! Keep your feet dry, there is nothing to find there.
Old Old Old Challenge
This is a Challenge cache. To log a find, you must fulfill the requirements beforehand. You may sign the log before you qualify, but you are only allowed to write a note. Logs will be monitored, and those who log a find but do not qualify will have their logs deleted.
To qualify for this challenge, you must find the oldest cache in three different countries. To see if you qualify, use the checker below.

As Cache Owner, I qualify for this challenge. At the time of publication, I have found the oldest cache in Denmark, Sweden, Qatar, and The Philippines.
There is no puzzle to solve, but any experienced Geocacher should know where to find the final coordinates.