Atlantis

 is a limited-time premium building that was released on August 20, 2018, as part of the Moe's Ark 2018 Event. Upon completion, the quest Atlantis starts.

Regular
Milhouse
 * Look For a Wife - 8h

Quest Based
Milhouse
 * Fail to Find a Bride in Atlantis - 4h

Trivia

 * Only one can be obtained.
 * The notification references the video game BioShock, where the phrase "would you kindly" is famously used. The game also takes place in an underwater fallen-utopian-city called Rapture.