Finding caches with a distance >161m is no big problem, at least every (physical) cache owner knows. Things get a bit more difficult for a distance of at least 161km and even more when caches of different type are required.
However, as distance requirements are not in line with the challenge condition rules I had to adapt a little, thus to log this challenge cache as a "found" you not only have to find the stash and sign the logbook but also provide evidence for the following challenge ...
Find caches in at least two regions of 10 different countries.
(Locationless caches and AdventureLabs are excluded, resp. do not count.)
Definition "region": The biggest territories a country is split into, for instance states or provinces.
Examples: Lower-Saxony and Hamburg are regions. Harburg and Rotenburg are counties!
Be aware that there may be countries that don't have any regions.
Challenge checker:
In fact, it is not ensured that finding caches in different regions guarantees a distance of 161km, but this is the closest valid rule I (and my reviewer) could think of.
To find the cache go to the published coordinates or the reference waypoint START and walk 161m in 161° (TN) direction or simply follow the trail to the south. The cache is placed in 161cm height.
In case you are too lazy to do a projection you can also go to the FINAL coordinates directly.
Watch out for the thorns. The cache may be a bit scratchy in shorts.
The logbook can only be signed with a waterproof permanent marker!
Add-on:
As I still like my initial idea I added the following BONUS challenge. Fulfilling this additional rule is NOT required to log this geocache!!
Find 10 caches of different types with a distance of at least 161km to each other.
(Locationless caches and AdventureLabs are excluded, resp. do not count.)
Sounds simple but I had to take some detours to succeed this challenge. You can find my 10 caches on this FlopsMap.
To provide evidence you succeeded this AddOn-Challenge you can either provide a list of caches, in whatever form, e.g. text, bookmark list, GPX or even preferred generate a FlopsMap with your 10 caches (you can use my map as a template), and disclose the proof in your log, via PM or email.
As a small reward I will generate a personalized banner with your account name and finds, you can add to your profile page.
Example:
Final remark: To complete this challenge you obviously have to travel to foreign countries where GERMAN is not always the mother tongue. Thus even geocachers from Germany who want to log this cache shouldn't have big problems with this international listing (or at least know tools that help to translate). :-)