The Cities of Eternus - Tower of Sol
Tower of Sol: This huge tower has hidden entrances all over Alba but they can only be found by a sun Elf and his companions if they search hard enough. The tower only appears at sunrise on certain days of the year the Helios mountains to those that are not members of the Sun Elf race but only for a good reason. On these days it can be seen from dozens of miles away.
Inside the massive tower radiates natural sunlight allowing all manner of plants to grow. Structures inside are formed out of stone, gems, and other natural materials. There are beautiful gardens arranged around statues that make up a series of interconnected courtyards. Several very important shrines are located in this capital city.