The Doctor's tomb

In an alternate timeline where the Eleventh Doctor died at the Siege of Trenzalore, the Doctor's TARDIS was underwent a size leak, grew into a monument and was used as his tomb.

The interior remained the same size but the control room grew dilapidated and overgrown. The console was absent and in its place was the tear representing the Doctor's timeline. The tomb's main entrance looked like the default outer shell of a TARDIS, while an alternate entrance was disguised as a false grave dedicated to River Song. (TV: The Name of the Doctor)

The timeline containing the tomb was negated when the Doctor regenerated into his twelfth incarnation after the siege, changing the future. (TV: The Time of the Doctor)