Forgotten Grave

The  is a premium decoration released on April 8, 2015, as part of the Level 51 update. It unlocks the The Tell-Tale Plant Worker questline and thus Frank Grimes.

Regular
Frank Grimes
 * Find Peace in the Grave - 8h

Quest Based
Frank Grimes
 * Meditate in His Coffin - 12h

Trivia

 * The is one of very few Decorations to unlock a character. The other ones include Bart's Tree House (Bart), the Houseboat (Sea Captain), King Winter's Cave (King Winter), the S.W.A.T. Van (Eddie and Lou), the Unfinished Shed (Chester Dupree) and the Rocket Car (Lampwick).