This quest [3210] is called 'Worldgates Tutorial - The Mark of Worldgates',
for Adventurers levels 20 to 250.
This is a TUTORIAL. It provides no rewards, but teaches you about Alyria.
Two moons orbit Alyria, Trigael and Marabah, which academics say are
responsible for the existence of magic in the world.  They also control the
mysterious Worldgates, portals which periodically appear in the center of
Circles of Stones around Alyria, depending on the moons' phases.  

There are dozens of these circles, and the worldgates that link them
together appear and disappear predictably within them.  The circles were
built by an ancient group of druids, reputed to be the first human
researchers into the origins and workings of magic.  Worldgates permit
instantaneous travel between them, like walking through a doorway.
Worldgates can link not only two far-off points on a map, but even two
points on different planes, such as between the Faerie Plane and the surface
of Alyria.  Other worldgate locations include the Sigil Underground, the
Alyrian Underground, the floating Verity Isle, and the dangerous Ethereal
Void.  

The location and timing of Worldgates are predictable, based on the current
phases of Alyria's moons, Trigael and Marabah.  You will need to obtain an
almanac of lunar charts to figure out where to go, but once you have them,
they will be a reliable reference for effortless traveling around the world.

Once you have obtained the almanac, you will need to walk towards the
closest of the active pair of Worldgates- and it is entirely possible that
neither will be close, which just means waiting until a closer pair opens.  

For a full list of the times and locations that Worldgates appear, HELP
WORLDGATES.  
This quest is part of quest #Transportation Tutorial - The Mark of Transport, #3206
Tutorial quests do not grant rewards.
This quest has no time limit.
Worldgates Tutorial - The Mark of Worldgates consists of:
Phase 1: *Head to the Courtyard of the Temple of Earth in Sigil- Sigil's recall point.
Phase 2: *Journey all the way south, down Sanctuary Road.
Phase 3: *Make your way west along Marefurium Way, to where it intersects South Arnica.
Phase 4: *A bit south of the intersection of South Arnica and Marefurium is the southern gate of Sigil.
Phase 5: *Pass through the gate, and you will find yourself on the south road, on the continent of Auryn.
Phase 6: *RUN DIOCLETIAN to make your way southeast across Auryn towards the magnificent Palace of Emperor Diocletian.
Phase 7: *Make your way inside, away from the beasts of the wilderness.
Phase 8: *Hug the eastern wall, and make your way north across the estate until you reach the entrance to the basilica.
Phase 9: *When you find the main entrance, go into the basilica and find the ladder to the roof.
Phase 10: *The scholars have a makeshift observatory on the basilica roof- go consult the astronomers about worldgates.
Phase 11: *The astronomers will keep records of their observations- obtain an almanac and figure out where the worldgates currently appear.
Phase 12: *Make your way to the most convenient worldgate location, or wait a while for them to change if neither location is convenient.
Phase 13: ENTER WORLDGATE to travel instantly to the far side of the world, through the other side of the gate.

You have gained the Mark of Worldgates!
You receive 35 quest points, and 20 practices.