Towns with "bridge" in their names
Waymarking category: N/A

"Bridge" towns

Markers on the Greenwich Meridian
Waymarking category: Greenwich Meridian Markers http://www.waymarking.com/cat/details.aspx?f=1&guid=a088c7d0-af6d-425d-a673-9b6cc93d4640

"Meridian" Markers

Unique birdhouses
Waymarking category: Unique Bird Houses
http://www.waymarking.com/cat/details.aspx?f=1&guid=a38e62e8-e084-437e-aa86-339cda4b2220

"Not Your Ordinary Birdhouse"

Be at a location whose lat/lon matches the current time
Waymarking category: N/A

"Timing" is Everything

Towns named "Waterloo"
Waymarking category: N/A

"Waterloo" all over the world

Welcome signs for towns starting with 'Z'
Waymarking category: 'Z' Welcome Signs http://www.waymarking.com/cat/details.aspx?f=1&guid=b269a70b-8929-478d-946a-ff68b6210ebf

"Z" Welcome Signs

Australian Trig stations
Waymarking category: Australian Trig Points http://www.waymarking.com/cat/details.aspx?f=1&guid=18b359b3-84e5-42f9-bbcf-c40ae533c962

#51 Great Southern Land:  (5) That's the Trig.

Punts and Ferries
Waymarking category: Ferries and Ferry Landings
http://www.waymarking.com/cat/details.aspx?f=1&guid=a149f71e-641b-4621-9f4a-ed24709db386

#58 Take a Punt

One-time event, lighting a candle on September 14, 2001 as a vigil after the 9/11 attacks
Waymarking category: N/A

* CANDLELIGHT VIGIL *

Locations where cachers have been ticketed for speeding
Waymarking category: N/A

>>FLITS<< aka Speed Trapped

Locations where cars reach 100,000 miles
Waymarking category: Record your vehicles odometer 10000's, 100000's and rollovers http://www.waymarking.com/waymarks/WM65M0
(This is technically not a category but a post in the Photo Goal category.  Submitters must post a visit on this waymark rather than posting a waymark to a category).

100,000 Mile Rest Stop

Visit any three locations and logically connect them in your log
Waymarking category: N/A

3 Steps Around the World

Summit one of the 54 peaks in Colorado over 14K feet.
Waymarking category: Mountain Summits (not Colorado-specific) http://www.waymarking.com/cat/details.aspx?f=1&guid=63c14036-82ef-4b90-b883-2dc6df5fe4ea&exp=True

54 Colorado Fourteeners

Lighthouses
Waymarking category: Coastal Lighthouses http://www.waymarking.com/cat/details.aspx?f=1&guid=bd6fee45-9189-4f20-8e4d-096a453eeaab

A BEACON IN THE NIGHT

Locations where the lat/lon coordinates read the same forward and backward
Waymarking category: Coordinate Palindromes
http://www.waymarking.com/cat/details.aspx?f=1&guid=f74b9d9e-9ab9-4a14-b3f0-89a4c226fb1e

A Cache of Palindromes 

Googie architecture
Waymarking category: Googie Architecture
http://www.waymarking.com/cat/details.aspx?f=1&guid=bcb544c5-f93a-4256-9ff5-124c8f9732cb

A Googie View

Publicly displayed scale model trains (HO, N, G or O)
Waymarking category: Model Railroads http://www.waymarking.com/cat/details.aspx?f=1&guid=f84a5b8a-af68-407d-9f7d-dc7febb03fd3&exp=True


a HO lotta fun!

Locations where the latitude and longitude minutes each contains all one digit.
e.g. N41° 33’ 33.3” W101° 22’ 22.2”

Waymarking category: N/A

A Pair of Quintuplets (Multi-Location Virtual)

Pictographs (hieroglyphs, petroglyphs)
Waymarking category: Pictographs http://www.waymarking.com/cat/details.aspx?f=1&guid=bf0b6f27-afd8-4dab-a22e-5503b8dabc7c

A Picture Says a Thousand Words

Visit coordinates that fit a particular mathematical formula
Waymarking category: N/A

A Product of Parts

Locationless (reverse) caches were a type of cache where instead of going to a specific location to find a specific thing, you instead searched the globe for instances of a specific type of thing.  These caches were eventually closed.  The site waymarking.com was created to replace the activity.  

This bookmark list enumerates the locationless caches and provides any corresponding waymarking categories.  It is a work-in-progress.  I welcome input on what waymarking categories are appropriate.

Locationless vs Waymarking.list-details-1wr9x6v{text-transform:uppercase;font-size:12px;}@media screen and (min-width: 600px){.list-details-1wr9x6v{font-size:1.25rem;}}.list-details-1wr9x6v.shareable{color:#87705a;}.list-details-1wr9x6v.public{color:#00b265;}Public

Locationless vs WaymarkingPublic