The Calamity Box is a magical relic that supposedly can be use for dimensional travel between both the human world and Amphibia.
Though its unknown how this box was made, except that for after some period of time, it had been supposedly destroyed but somehow remained on Earth where three girls; Anne Boonchuy, Sasha and Marcy had thrift stolen it from a store and soon opened it which instantly send them all to Amphibia. According to one of Hop Pop Plantar's books on the Calamity Box itself which described as extremely dangerous but little else is still known.
- Calamity is defined as "an event causing great and often sudden damage or distress; a disaster", which further implies the box to be dangerous.
- A real-life version of the box appears at the 2019 D23 Expo. It is presented by Matt Braly, who then lets Kermit the Frog have a look at it, but advises him not to open it. However, Kermit gives in to his temptation and gets teleported to Amphibia. He comments on the journey being "faster than taking the 5 freeway" due to less traffic.