Florin/Guilder Fire Swamp

The Florin/Guilder Fire Swamp is dangerous forest featured in The Princess Bride.

Physical description
Measuring about 8.3 square miles, the Florin/Guilder Fire Swamp is located between Florin and Guilder. Like other fire swamps, it has large, lush trees, and contains a large percentage of gas bubbles, especially sulfur, which spontaneously combust.

Trivia

 * The Fire Swamp was filmed at H Stage, the largest soundstage at Shepperton Studios.
 * The set was the very first set built for the film.