You Humans have your legendary places that earned a place in the history books. Death Valley. Suicide Forest. The Bermuda Triangle. We ponies can top that with something worse.
The Sea of Fire.
Locates between my homeland of Equestria and the ancient country of Judecca, the Sea of Fire is a notorious and scorching hot stretch of desert that borders our two great civilizations. It is said that big spots of pure glass can be found in some of the hottest regions of the Sea, and she doesn't take prisoners lightly. You'd be considered blessed by the Gods if you got hit with insanity or heat stroke.
For centuries, there was only one exact way of getting messages and materials between Judecca and the rest of the Equestrian countries: by boat. But the warm air of the Sea of Fire mixed with the cold current that flows down from the Frozen North creates a lot of fog and storms, making the route almost as treacherous as traveling through the Sea of Fire itself.
There have been various attempts to