Case file · Secret facility (alleged)
Laguna Cartagena 'underwater base'
Through the late 1980s and 1990s residents of Lajas and Cabo Rojo reported lights entering and leaving Laguna Cartagena, and a story spread of an alien base beneath the lagoon.
1990 CE · 18.01, -67.10 · status: claim
The account
Rumours spoke of US and alien personnel working together and of the area being closed off. The lagoon is in fact a freshwater wetland, a national wildlife refuge since 1989, important for waterfowl.
The sceptical view
There is no physical evidence of any installation. The lagoon is shallow and heavily silted, and the refuge is open to visitors.