The Bermuda Triangle is a loosely defined region in the western part of the North Atlantic Ocean, where a number of aircraft and ships are said to have disappeared under mysterious circumstances.
The Scooby-Doo Show
The gang was boating in the Bermuda Triangle when they encountered a hurricane and ended up stranded on a deserted island -- which appered to be home base for a UFO that captured Hurricane Hunter aircraft. Not only that, but there were also some skeleton men on the loose.
The 13 Ghosts of Scooby-Doo
The gang were at a restful vacation, unaware that the cruise ship they'd booked passage on was populated by ghosts.
Scooby-Doo! Pirates Ahoy!
The Mystery Inc. gang were caught in the mystery of the Bermuda Triangle, while vacationing on a creepy eerie cruise, with ghost, pirates, and monsters. 
- The Scooby-Doo Show
- The 13 Ghosts of Scooby-Doo
- 106. Ship of Ghouls
- DTV10. Scooby-Doo! Pirates Ahoy!