In a Game of Thrones fanfic, Smaug's lair could be in the mountains, similar to where he was in Middle - earth. It might be a vast network of caves filled with his hoard of gold, jewels, and other treasures. The caves could be filled with the bones of those who tried to steal from him, creating a spooky and dangerous atmosphere.
I'm not sure specifically as there could be many novels with this name. It might be about a dragon's dwelling place and the adventures that happen around it.
There probably is. Fanfiction writers love to experiment with different ideas. This idea of Harry Potter being Smaug's son could lead to some really interesting plotlines. For example, how would Harry's Hogwarts education be affected by his dragon heritage? Would he have special powers related to dragons? And how would the wizarding community react to his rather unusual parentage? There are so many possibilities for a story like this in fanfiction.
There could be a young adventurer as the main character. This person might be on a journey to prove themselves and decides to enter the dragon's lair. They could meet other characters along the way, like a wise old hermit who gives them advice on how to deal with the dragon, or a group of thieves who also have their eyes on the lair's treasures.
The Lair is purely fictional. It was crafted from the imagination of the creative team and doesn't draw from real-life events. They came up with the plot and characters to entertain the audience.
Yes, there might be some. Fanfiction platforms often have a wide variety of crossovers. You can check websites like Archive of Our Own (AO3). Writers love to combine different fictional universes, and Harry Potter and Smaug from 'The Hobbit' are interesting characters to put together in a story.
Well, it depends on how you define 'good'. There could be fanfictions exploring the concept of a pregnant Smaug in different ways. Maybe some are more comical, imagining how the other characters in the Middle - earth universe would react to such a situation. Others could be more serious, delving into the implications it might have on the lore or the world - building.