Where to find them.
(Listed in the approximate order acquired.)

No. X Y Secret Type Description of Secret's location ... and what to do
1 1 21 Secret Switch #1 The Switch is found next to an ice crystal hidden behind a large tree.
It createz two temporary bridge tilez around the King's Fortress island.
2 25 25 Red Warp #1 The SecretTeleporterTrigger is an ordinary Tile south of a Hole on the eastern edge of the map.
The Red Warp will open near a Mound northwest of the trigger.
The wormhole will take the grunt to the King's Fortress island next to a Coin (#2, if you find the Secret; #4 if you don't).