Tickets are found on more than one island, so you should ask accordingly.
Counterfeit Island
The Underground Tour tickets are in a round trash can near the entrance. Return them to the owner at the Web Browser cafe. (You may need to take a green balloon fromthe Clown Store to the Countryside first.)
Cryptids Island
You win the tickets to the rowboat and submarine rides by playing darts, at the Pub to the right of the Loch.
It belongs to the guy you first say in the internet cafe playing the game on the computer.
You find the tiketes in the trash can by where you go to the tonele.
You get them after you beat the guys at darts in the pub.
Find the tickets at the bottom of a trash can and give one to the man in the cafe and use one to go on the tour.
you give it to the guy in the coffee shop and then you get to keep one
You give the ticket to the tour guide and then she lets you into the tunnel.
Go to the cafe and give them to the guy on the computer. Then he will give you one.
you find all the clues like the tickets in the garbage can
u go down town click on the trash can and move all and you will find it
There are two trashcans by the underground ticket area. Look inside of one of them. Dig to the bottom and you will be able to find the two tickets.:)
In the trash can
In the garbage can
if you dont have tickets for the underground tour, dig in 1 of the garbage pails and you will find them. go to the man that wont get off his labtop. the tickets are his. talk to him and then use the tickets