Swamp Thing was shot on location at the Universal Studios and Gatorland theme parks in Orlando, Florida. Many rides and attractions are visible or feature prominently throughout the series.
For the first thirteen episodes, second unit scenes were shot on location in actual Florida swamps. However to both save on costs of transporting cast, crew and equipment, and to have more control over filming conditions a swamp set was built at Universal Studios' property. It was included on the Production Studios Tour until after the series ended.
The film crew of the prior film, La Créature du marais II (1989) offered the suit Dick Durock wore in that film for use to the makers of this series, who refused it and instead made their own Swamp Thing suit. Durock later explained he considered the suit he wore for this TV series to be the best-looking SwampThing suit he ever wore.