The only "secret places" are the throne rooms of Hades and Poseidon.
You can only reach them after Zeus has taken the 5 sacred items. Hercules will help you move the rocks if you have the Touchscreen Mirror (pass Aphrodite's test in Poseidon's realm).
Youspeak to the god then you goto the secret path
Give the guy with the horns the honey and use the secret entrance.
you go to the edge of the branch and jump nw (north west)
To access the secret path in Mythology Island on Poptropica, you need to first complete the main quest and defeat Zeus in the final battle. After that, return to the base of Mount Olympus and follow the path on the left side of the screen. You will find the entrance to the secret path, allowing you to explore Greek mythology further.
At the place to the far left with the aqueduct.
The message is: Whoever wields the five sacred objects will rule all of Poptropica!
It is one of the sacred items. Find them all to find out Zues's secret! ~Pop Whiz
you have to clean the grafiti outside of hades place
thru the myth of Persephone
The starfish on mythology island is on the face of the statue of Poseidon in the place right next to the balloon when you get on the island.
in the cabinet on big Nate island
You take them back to the Tree of Immortality, where Athena will show you a secret message on the items.