The Lost City of Night was the original home of the NightWings before they moved. It is unknown where they went after they left, but they may have moved directly to the NightWing island. Either way, they ended up on the NightWing island later on. It was one of the main settings for the book Darkstalker. No living dragon except Foeslayer knew where it was until Darkstalker emerged from under the mountain. It is located just south of the Kingdom of Sand, on a peninsula known as the Talon Peninsula (likely named as such because it makes up the front "leg" of the dragon-shaped continent of Pyrrhia).
The kingdom's terrain consists of mountains, with deep canyons in between them. Caves delve deep into the mountains, and the coast is lined with rocky black-sand beaches and littered with tide pools and half-flooded caves. In Darkstalker, it seems like the peninsula is shaped like claws, while in the books set in modern-day the peninsula is far smaller and lacks these claw-like capes. The geographical appearance has changed much from the time period of Darkstalker to after the War of SandWing Succession, with most of the peninsula having collapsed into the sea at an unknown time. As the elements have made the "talon" smaller, the Night Kingdom is now the smallest Kingdom in Pyrrhia. Surrounding the border is the mountain range called Darkstalker's Teeth, which is where Darkstalker's IceWing repelling curse was placed.
Vigilance's palace was the center palace for the NightWing tribe and was once inhabited by Queen Vigilance. The palace includes royal suites (one of which Fathom and his bodyguards had stayed in), a throne room, a royal tower, and more. The palace was briefly ruled by Darkstalker when he became king of the NightWings and brought most of his tribe back to the lost city. However, he was soon defeated and the tribe returned to the Rainforest Kingdom. It is part of the Great Diamond, which is made up of the palace, a school, a library, and a museum.
The throne room is usually used for Queen Vigilance's parties. It is also the site of fights for armbands and appears many times in the future seen by Clearsight and Darkstalker.
The Great Diamond is what the NightWings called the shape formed by the tribe's most important buildings. The palace and school were placed to the north, not far from each other, and the museum and library finished the shape towards the south. The palace was noted to be the largest of the four buildings. These four buildings formed a diamond-shaped plaza, hence its name.
All the NightWing dragonets attended this school. It was very sophisticated (and more magnificent than Jade Mountain Academy). It housed dragonets from ages 2 and up, and was designed to resemble Queen Vigilance's palace, with its grey and black marble floors, hanging gardens, and towers. The school is located north of the palace and is one of the buildings making up the Great Diamond. Known teachers here are Truthfinder and Allknowing. Aquariums and terrariums covered the walls, some glowing with phosphorescent rocks or plankton. Long-finned fighting fish, also called bettas, were kept in separate bowls along with a tortoise in a glass cage. Owls were kept in cages near scavengers. Tamarin monkeys and crocodiles were also kept in the classrooms.
The Tower of Knowledge is a tower in the lost city of night, described as a tall, cylinder-shaped tower with no windows or doors. The only entrance was through the roof, which was open to the sky. It was used as a classroom; Allknowing taught seers inside it during the time of Darkstalker. Students who attended classes there included Clearsight, Morrowwatcher, Jewel-eyes, and Vision. Allknowing taught them to tell the difference between a dream and a vision, and how to make visions into cryptic prophecies. It was the central of the five towers making up the NightWing school.
It was described to have a pale blue door, which led into a sunlit room adorned with white rugs and glittering crystals (Clearsight assumed this was to make Arctic feel more at home) and a couch in the middle. One wall was lined with scrolls tucked into little niches. The kitchen was described to be 'impossibly clean' and had tools in it that Clearsight had never seen and couldn't imagine how to use. There was a fireplace with a painting of the family done by Whiteout on the mantle, the picture painted in shades of blue and making the family appear more related than in real life.
Whiteout's room contained many paintings of IceWings and NightWings flying together. Most were done in shades of blue, and Darkstalker describes some to be from Whiteout's "Wishful Thinking" series. There were also many pictures of constellations, the three moons, and starscapes.
Darkstalker's room was down the hall from Whiteout's and his sleeping spot was marked by a pile of neatly folded purple and white blankets. He also had a trunk, where he would keep extra blankets and a few weapons. His desk was bare except for cloth and three inkwells containing black, royal blue, and emerald green ink. There was a scroll rack next to the desk, and behind it, Darkstalker's scroll, and an invisible inkwell that was hidden behind a stone in the wall.
As for the rest of the NightWings, their houses were like Darkstalker's. They were built on the sides of mountains or in canyons or large ravines, being placed higher, and closer to the stars, if you have a higher rank.
An expanse of beach at the north end of the Night Kingdom peninsula, which is rocky and pebbled, unlike the smooth sandy beaches of the southern shores. It faced a bay with the Kingdom of Sand on the far side, just out of dragon eyesight but close enough that most NightWings avoided it. There are giant boulders strewn on the beach. It has also been noted that dragons have practiced swimming there.
The mountain which the NightWing palace at the lost city of night wraps around. Forests were mentioned to be present on the mountain.
"Jade Mountain will fall beneath thunder and ice
Unless the lost city of night can be found"
This Kingdom was mentioned again in the Jade Mountain Prophecy when Moonwatcher said:
"Jade Mountain will fall beneath thunder and ice,
Unless the lost city of night can be found."
It is even mentioned a couple of times through the book, including when the Jade Winglet visited the ruins of the Night Kingdom mistakenly believing it was the lost city of night.
While Darkstalker was leading the NightWings to the lost city of night, he flies ahead when the other NightWings were sleeping. Turtle stealthily and silently follows him.
When Darkstalker reaches the Kingdom, he flies into the NightWings' old school. While under his invisibility spell, Turtle places a marble he had found in front of Darkstalker, which was probably part of the same marble set from Darkstalker, and he thinks that Clearsight was still alive and trying to tell him something.
The lost city of night was the setting of part of this book. In the city, they rescued Turtle from Darkstalker and learned that the NightWings were about to start a war against the IceWings. Then the dragonets hurried back to Jade Mountain.
The lost city of night is the main setting in Darkstalker and is home to the two NightWing protagonists, Darkstalker and Clearsight.