History of the Jews in Puerto Rico Very few American Jews settled in Puerto Rico after it was ceded by Spain to the United States under the terms of the 1898 Treaty of Paris, which ended the Spanish–American War. The first large group of Jews to settle in Puerto Rico were refugees fleeing German–occupied Europe in the 1930s and 1940s. The second influx came in the 1950s, when thousands of Cuban Jews (most of Eastern-European descent) fled after Fidel Castro came to power. The majority immigrated to Miami, Florida, but a sizable portion chose to establish and integrate themselves on the neighboring island because of Puerto Rico's
Underwater habitat of with a hatch depth of . The lagoon contains artifacts and wrecks placed there for education and training. From 1993 to 1995, NASA used MarineLab repeatedly to study Controlled Ecological Life Support Systems (CELLS). These education and research programs qualify MarineLab as the world’s most extensively used habitat. MarineLab is also used as an underwater laboratory for excursions and underwater laboratory training for recreational and sport divers who stay under the sea at the Jules' Undersea Lodge. MarineLab is currently located next to the Jules' Undersea Lodge, which is actually the La Chalupa Research Laboratory converted into a luxury