The Altars of the Eximagdra are the birthplaces of the six Platinum Dragon Gods. This imbued those places with immense magical powers. The ley lines are the lines connecting these six spots.
Created by Tamara, the tree Finndrassill represents her perfectly, peaceful. When the tree was created so were the Moonborne Elves. These Elves were made in her image, representing her calm and generosity. Finndrassill itself isn't as much the altar, but the well on which it was planted is, the Moonwell. This well serves as the power source to all the Moonborne Elves. Finndrassill is Elvish for "Crown of the Last", and it is built over the last Moonwell.
Created by Bahamut, this place is the tallest mountain in the whole world. On this mountain, the Giants have build a sacred place over the last 10 millennia. This place guards the Pillar, and houses mostly Cloud and Mountain Giants, but also Dwarves and the magnificent Yellow Dragons. When the Pillar of the World was created there wasn't a mountain at all. It was a large Human castle, belonging to a long-forgotten kingdom. When the Pillar was created it obliterated the castle and transformed these Humans into the many types of Giants, who now live scattered around the world.
Created by Cildra, this column of fire and flames reaches as high as the stars. This beacon of arcane energy can be seen from hundreds of miles away. When the Spiral was created it also created the Sunborne Elves, which draw all of their power from it, filling themselves with the roaring fires and the rage of the evil Dragon.
Created by Lendys, the Tear of the Dragon lies south of the mainland, on Glacier Island. On the creation of this altar, the few people who were near were transformed so that they could survive the harsh environments of Glacier Island. Those few and their descendants now serve as guards on the island.
Created by Imbross, the Throne of the Lich is the birthplace of all Undead. When she was born she spawned an army of Undead, including several Liches. One of these serves as her champion, called the Lich King. All Undead are bound to the Altar, and they can never leave its presence unless there is a higher power at play. All the beings around the altar at creation were turned into the many types of Undead.