After surviving a brutal pandemic shutdown, it has made a dramatic comeback.Carnival Corp. (CCL 7.05%) has experienced a huge rebound since the pandemic. After shutdowns left it without a significant revenue source for over a year, massive debts and a long process of returning to normalcy left its stock without an obvious catalyst.However, Carnival's ships are again packed, and bookings are at record highs. Such conditions should prompt investors to take a closer look at the cruise line stock.The Carnival c ...