Sysiphus is cursed to forever till a boulder uphill.
The Hilbert Hotel is a philosophical math idea. It has an infinite number of rooms, all full. If you another person wants a room, everyone with a room moves over one. Room 1 moves into room 2, etc. Room 1 is now empty for the new person, and the hotel again has an infinite number of rooms, all full. Just one larger infinite than before.
The Ship of Theseus is a Greek story from Plutarch’s Lives about a ship whose parts get replaced as they wear out. The question is - is it the same ship if it has none of the same parts?