This fortress-themed attraction is located on the west side of Mediterranean Harbor.

Within the attraction guests can walk around the fortress grounds freely, which contains a Focault pendulum, an astral observatory, the sailing ship Renaissance, flying machines, an alchemy lab, a navigation center, an optical illusion room, and a Hall of Explorers honoring various historical figures.

[1] On July 7, 2008, a scavenger hunt program called "The Leonardo Challenge" started, so named as an actor playing the ghost of Leonardo da Vinci would appear on interactive kiosks for the experience.

Guests receive the map and rely on it to find a "lava control station" somewhere in the attraction; however, a variety of trials await them before arrival.

can also be found within Tokyo DisneySea's Tower of Terror and Soaring: Fantastic Flight attractions and in many other Disney Parks attractions around the world such as Mystic Manor in Hong Kong Disneyland, the Jungle Cruise, Big Thunder Mountain Railroad in Magic Kingdom, Oceaneer Lab in Disney Cruise Line and Miss Adventure Falls in Disney's Typhoon Lagoon, with characters from these rides being members of the organization.