A litter box for sheltering one or more pets. The litter box includes a housing having a base and at least one vertical side wall (including an entry-exit opening), which may be forming a one-piece enclosure for accommodating the one or more pets. An inner surface of the one-piece enclosure may be a smooth surface including rounded edges. Further, the litter box includes a removable lid for removably attaching to at least one top edge of the at least one vertical side wall. Further, the litter box may include a detachable holder for detachably placing on an outer surface of the at least one vertical side wall, to hold at least one absorbent pad. Further, the litter box may include a removable organizer for storing a plurality of cleaning supplies.