The riddle about "which bus can cross the ocean" typically refers to the play on words involving a "submarine." The word "sub" is a common abbreviation for "submarine," which is designed for underwater travel. The humor lies in the unexpected twist that a bus, typically thought of for land travel, can "cross the ocean" when interpreted as a submarine.
A cruise ship, A boat, A yacht...The Magic School Bus.
A ship
ColumBUS
First of all you need the riddle. Here is one. Why did Cleopatra cross the tomb? To get in!
Why did the chicken cross the road?
A diamond geezer [geyser] !
which ocean did columbus cross after he left spain
Indian ocean you cross the Indian ocean to get to the other side
the Indian ocean!
You would cross the Atlantic Ocean.
From Britain I would cross the Atlantic Ocean.
You would cross the Indian Ocean.