From the Super Mario Wiki
Royal Raceway (also known as Peach Circuit in Japan) is the third racetrack of the Star Cup in Mario Kart 64. The race takes place around a giant lake and it is easy to fall into the water. There is a big jump over the lake in one section of the track. If the racer goes off track after the jump, they can see and drive around Princess Peach's Castle, as it appeared in Super Mario 64. The Award Ceremony also takes place in this racetrack at the end of the cup, where the top three drivers receive various trophies, and confetti for the big winner along with the gold trophy.
 Instruction manual description
Of the three speedway-type courses, this one covers the greatest distance. The big jump after the dash zone is very dramatic. Without guardrails along the lake, it can be very easy to overshoot the corner and fall in!
 Names in other languages