Secret lands is a hidden cave in pikmin 3 RTTPP.It has Only ice,acid and fire hazards.At the end there is a secret final boss. The transforming scorplon.It starts by turning into Oblisk Burrow-Nit until HP is down to 66%,Then it turns into Clambering Wraith until 33% HP is left Then for the rest it is A Omega Progg.Same tactics for each boss. Then is drops the LAST TREASURE The Enigmatic Key.(A small keyblade)