Rose Garden of Eternity
From Tardis Wiki, the free Doctor Who reference
The Rose Garden of Eternity was a garden on the planet Tellus IV kept secret by the Gardener.
It bloomed once every thousand years and showed a prophecy written in its flowers. Its Thirteenth Flowering depicted a blue TARDIS, the Galactic Seed Vault and the number 13, which prompted Willow to ask the Thirteenth Doctor for help. (PROSE: The Secret in Vault 13)
