Rose Garden of Eternity

The  was a rose 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.

The garden was burned down by the order of Nightshade. (PROSE: The Secret in Vault 13)