ARQUA

In Cartagena, on the dock of the port, near the Peral Submarine, is the National Museum of Underwater Archaeology (ARQUA).
'ARQUA is the institution responsible for raising public awareness of the Underwater Cultural Heritage of Spain, promoting its conservation, and thus enhancing its use and enjoyment.
Its objectives are the study, evaluation, research, conservation, promotion and protection of Spain's Underwater Cultural Heritage.
ARQUA is also the home of the Permanent Observatory of the National Plan for the Protection of Underwater Cultural Heritage.' (Source: ARQUA)

Take a look as well as inside, the exterior of the building. In fact, the model and drawings were exhibited at the MOMA in New York.
These days, ARQUA is at the news because it could be a candidate to host the coins of "Nuestra Señora de las Mercedes" ("Our Lady of LAs Mercedes") frigate, the Spanish ship sunk off the coast of Cadiz in 1804 by the British Navy, returning from America loaded with gold and silver. Coins that Odyssey Marine Exploration had found in 2007, without notice to the Spanish government, and that after a long legal dispute at the U.S. has allowed to return to Spain.