Screenshot Timeline of Dragonstone Island in House of the Dragon Season 2

Screenshot Timeline of the Dragonmont Volcano in House of the Dragon Season 2

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Screenshot Timeline of the Dragonmont Pathway in House of the Dragon Season 1

Screenshot Timeline of Dragon Entryway & Exit in House of the Dragon Season 2

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Screenshot Timeline of Vermithor's Personal Meet & Greet Chamber  in House of the Dragon Season 1

Screenshot Timeline of the Dragon Mounting Area in House of the Dragon Season 2

Screenshot Timeline of Silverwing's Nesting Area in House of the Dragon Season 2

Screenshot Timeline of Syrax's Nesting Area in House of the Dragon Season 1

Behind the Scenes Development of Set for Syrax's Incubation Chamber

 The comet’s tail spread across the dawn, a red slash that bled above the crags of Dragonstone like a wound in the pink and purple sky. The maester stood on the windswept balcony outside his chambers. It was here the ravens came, after long flight. Their droppings speckled the gargoyles that rose twelve feet tall on either side of him, a hellhound and a wyvern, two of the thousand that brooded over the walls of the ancient fortress. When first he came to Dragonstone, the army of stone grotesques had made him uneasy, but as the years passed he had grown used to them. Now he thought of them as old friends. The three of them watched the sky together with foreboding. 

...

And yet . . . and yet . . . the comet burned even by day now, while pale grey steam rose from the hot vents of Dragonmont behind the castle, and yestermorn a white raven had 1 brought word from the Citadel itself, word long-expected but no less fearful for all that, word of summer’s end. Omens, all. Too many to deny. What does it all mean? he wanted to cry.

- Book 2: A Clash of Kings

 “The dragons cannot come to life. They are carved of stone, child. In olden days, our island was the westernmost outpost of the great Freehold of Valyria. It was the Valyrians who raised this citadel, and they had ways of shaping stone since lost to us. A castle must have towers wherever two walls meet at an angle, for defense. The Valyrians fashioned these towers in the shape of dragons to make their fortress seem more fearsome, just as they crowned their walls with a thousand gargoyles instead of simple crenellations.” He took her small pink hand in his own frail spotted one and gave it a gentle squeeze. “So you see, there is nothing to fear.” 

- Book 2: A Clash of Kings

The Targaryens were of pure Valyrian blood, dragonlords of ancient lineage. Twelve years before the Doom of Valyria (114 BC), Aenar Targaryen sold his holdings in the Freehold and the Lands of the Long Summer, and moved with all his wives, wealth, slaves, dragons, siblings, kin, and children to Dragonstone, a bleak island citadel beneath a smoking mountain in the narrow sea.

- Fire and Blood "Aegon's Conquest"

He burned the letter and never spoke of it again, but that night he mounted Balerion and flew off across the waters of Blackwater Bay, to Dragonstone upon its smoking mountain.

- Fire and Blood "Reign of the Dragon: The Wars of King Aegon I"

Though Aegon had designated King’s Landing as his royal seat and installed the Iron Throne in the Aegonfort’s smoky longhall, he spent no more than a quarter of his time there. Full as many of his days and nights were spent on Dragonstone, the island citadel of his forebears. The castle below the Dragonmont had ten times the room of the Aegonfort, with considerably more comfort, safety, and history. The Conqueror was once heard to say that he even loved the scent of Dragonstone, where the salt air always smelled of smoke and brimstone. Aegon spent roughly half the year at his two seats, dividing his time between them.

- Fire and Blood "Three Heads Had the Dragon: Governance Under King Aegon I"

 Dragonstone did have one thing King’s Landing largely lacked: dragons. In the great citadel under the shadow of the Dragonmont, more dragons were being born every time the moon turned, or so it seemed. The eggs that Dreamfyre had laid on Fair Isle had all hatched once on Dragonstone, and Rhaena Targaryen had made certain that her daughter made their acquaintance. “Choose one and make him yours,” the queen urged the princess, “and one day you will fly.” There were older dragons in the yards as well, and beyond the walls wild dragons that had escaped the castle made their lairs in hidden caves on the far side of the mountain.

- Fire and Blood "Birth, Death, and Betrayal Under King Jaehaerys I"

Thinking that he might be of a bookish disposition, Maester Culiper tried to interest him in the treasures of Dragonstone’s library, the ponderous tomes and Old Valyrian scrolls that had fascinated King Jaehaerys, only to discover that the queen’s husband could not read. Androw rode passably well, and from time to time would have a horse saddled so he might trot about the yard, but he never passed beyond the gates to explore the Dragonmont’s rocky paths or the far side of the island, nor even the fishing village and docks beneath the castle.

- Fire and Blood "Birth, Death, and Betrayal Under King Jaehaerys I"

Only the middle son, Prince Aemond, remained dragonless, but His Grace had hopes of rectifying that, and had put forward the notion that perhaps the court might sojourn at Dragonstone after the funeral. A wealth of dragon’s eggs could be found beneath the Dragonmont, and several young hatchlings as well. Prince Aemond could have his choice, “if the lad is bold enough.”

Even at ten, Aemond Targaryen did not lack for boldness. The king’s gibe stung, and he resolved not to wait for Dragonstone. What did he want with some puny hatchling, or some stupid egg? Right there at High Tide was a dragon worthy of him: Vhagar, the oldest, largest, most terrible dragon in the world.

- Fire and Blood "Heirs of the Dragon:  A Question of Succession"

Moreover, six other dragons made their lairs in the smoky caverns of the Dragonmont above the castle. There was Silverwing, Good Queen Alysanne’s mount of old; Seasmoke, the pale grey beast that had been the pride and passion of Ser Laenor Velaryon; hoary old Vermithor, unridden since the death of King Jaehaerys. And behind the mountain dwelled three wild dragons, never claimed nor ridden by any man, living or dead. The smallfolk had named them Sheepstealer, Grey Ghost, and the Cannibal.

- Fire and Blood "The Dying of the Dragons: The Blacks and the Greens"