In 2015, Swedish artist Susanna Hesselberg built a library that descended into the ground like a rabbit hole. Luckily, glass covered the top to prevent any bibliophiles from falling in. As the hole got deeper, the books got darker, and eventually vanished. The work, titled When My Father Died It Was Like a Whole Library Had Burned Down,” was meant to symbolize the crushing feeling of loss that comes with death.  The installation was part of the fourth edition of Sculpture by the Sea, where 56 sculptures were erected along the coast of Aarhus, Denmark. Other works included giant reflective diamonds and security cameras collecting on rocks.