This Cache:
This challenge cache, which is at the published coordinates, requires you to take a tour through geocaching's history. Finding older caches has been one of my favorite things to do, and in order to qualify for this challenge, you will ned to find some old caches too.
To qualify and claim this find, you must have logged at least one cache published in each year beginning in 2000 and continuing to the present year.
Here is a checker to help you track your qualifying status:

In your log, please include the checker output. I enjoy seeing what caches people have found; I'm sure you do too!
Here's my output, as an example:
2000 2015-08-16 GC79 Iron Horse
2001 2013-06-08 GC1C9C Chimney Rocks Park
2002 2013-10-01 GC98A6 White Lady of the Buckhorn
2003 2013-09-30 GCFDBE Andrews Galitzen Spring Cache
2004 2013-07-03 GCKK14 Little Kahuna!
2005 2013-08-06 GCRDVM Murdoch
2006 2013-06-16 GCWW0Q Tudek Loop
2007 2013-08-04 GC13QYK Something fishy...
2008 2013-06-30 GC1BE2G Find Your Roots Cache
2009 2013-07-02 GC1MQP1 The Garden Sea-cret
2010 2013-06-01 GC29GPJ Canal Basin Park
2011 2013-06-01 GC36Y63 Spring Into Action
2012 2013-06-01 GC3TB3R Kid's C&D #9
2013 2013-06-09 GC46GBZ Pay the Toll, Troll!
2014 2014-03-12 GC4ZYAY Rocky Trail II
2015 2015-01-01 GC5JDP2 Operation Eagle's Nest
2016 2015-06-10 GC22K21 Beware...The Troll Guards This Cache
2017 2017-02-02 GC6ZA51 One More Smiley in SGL 118
2018 2018-01-01 GC7FHRA Oliebollen, 2018!
2019 2019-01-01 GC81CWZ First Day C.I.T.O.
2020 2020-01-01 GC8GR2B To Memories & Making More
The Series:
This 20-for-20 Series was placed as a collaboration of MrBee&WillowTree, Superchucklez, 74vwBus, WHATS IT SAY COL 2, mrGreen317, OddMushroom, and Profbrad. We wanted to place a series of 20 geocaches to celebrate 20 years of geocaching. We hope you enjoy the various types of hides, all across JAGA-land: Micro, Small, Regular, Large; Traditionals, Multi-Caches, Letterbox-Hybrid, Wherigo, and those pesky Mysteries. Happy 20th Birthday, Geocaching!
On May 3, 2000, Dave Ulmer, a computer consultant, wanted to test the accuracy of GPS by hiding a navigational target in the woods near Beavercreek, Oregon. He called the idea the "Great American GPS Stash Hunt" and posted it in an internet GPS users' group. The idea was simple: Hide a container out in the woods and note the coordinates with a GPS unit.
The finder would then have to locate the container with only the use of his or her GPS receiver. The rules for the finder were simple: "Take some stuff, leave some stuff."
On May 3, Dave placed his own container, a black bucket, in the woods, taking the location's coordinates to be N 45 17.460 W 122 24.800. Along with a logbook and pencil, he left various prize items including videos, books, software, and a slingshot. He shared the waypoint of his "stash" with the online community on sci.geo.satellite-nav.
THE REST IS HISTORY!
(Historic text taken, mostly as-is, with minor edits, from www.geocaching.com/about/history.aspx)
Throughout the month of May 2020, look for five caches of this series to publish each weekend, with a "series final cache" to conclude the series on May 30. That's one new JAGA-land cache for each year of geocaching's history, plus "one to grow!"
Be sure to write down or take photos of code words provided in each of the series caches that will help you get the coordinates for the series final when it is available at the end of May.
See the entire 20-for-20 series list at http://20for20.jaga.group
As the geocache owner, I ensure that the above link is to a local geocaching group site that is active in the community and contributing to geocaching in positive ways. This link has not been checked by Geocaching HQ or by the reviewer.