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 Trail Registers 
by:  Trail Registers Trail registers are log books placed at various locations along long hiking trails. They are places where hikers can sign their name and share their stories with the community. |
 Human Migration Monuments
by: Human migration This category is to Waymark monuments to Human migration and pay homage to all human beings who for one reason or another had to migrate and face the difficulties associated to build a new home away from home. |
 International Space Station Sightings
by: Space Science This is a game that requires two or more players to "catch" the International Space Station as it visibly passes through the night sky across hundreds or thousands of miles in one of its orbits around the globe. |
 Zip-line
by: Flying on cables A zip-line consists of a pulley suspended on a cable mounted with an inclination. It is designed to enable a user propelled by gravity to go from the top to the bottom of the inclined cable |
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 Azimuth Benchmarks
by: Azimuth Marks Azimuth marks associated with geocaching.com's benchmarks need a place to be waymarked and logged. These marks are associated with Survey Disks, Triangulation Station Disks, and Horizontal Control Disks and are a great challenge to find. Azimuth marks typically are not associated with, "Benchmark Disks, Vertical Control Disks, or Metal Rods." These types of marks if not already listed on geocaching.com can be logged under the "Recovered US Benchmarks" category. |
 Canal Tunnels
by: The Watery Burrowers Mankind has been endeavouring to discover methods of crossing natural obstructions for centuries. There are many tunnels, all vital to our infrastructure and they display some of the most marvellous feats of engineering.
This category seeks canal tunnels which are safely accessible and are of some interest. A canal is a manmade waterway which is navigable by transport and can carry boats shipping goods and people. The tunnel must have been/or be used by boats, not be a water only channel. |
 Arch Bridges
by: Arch Bridges Place all bridges here which you find are constructed with an arch used as the main load bearing structure. This type of bridge design is one of the oldest and longest lasting. Several stone arch bridges made over 1000 years ago are still standing today, even without the use of mortar. No arch bridge is too small or too big for this category. |
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