Waikiki Natatorium & Aquarium Traditional Geocache

The Waikiki Natatorium War Memorial, simply called the Natatorium, is a war memorial in the form of an oceanwater public swimming pool. The Natatorium was built as a living memorial dedicated to "the men and women who served during the great war" (now known as World War I)

Located in Honolulu, at the shore west of Kapi'olani Park and completed in 1927, the natatorium was built in the Hawaiian Beaux-Arts architectural style. The entrance to the memorial includes an arch featuring four stone eagles typical of this style. For generations, the natatorium was a popular recreational gathering center for local Hawai'i residents and tourists. Inside the memorial is a 100 meter by 40 meter salt water swimming pool. Its historical patrons included Olympians Buster Crabbe, Johnny Weissmuller and local Duke Kahanamoku. After the attack on Pearl Harbor in 1941, the natatorium was taken over by the US Army and used for training during World War II. In 1949 it was refurbished and turned over to the City and County of Honolulu on July 1, 1949. Its condition deteriorated, and was officially closed in 1963, but continued to be used. It was added to the National Register of Historic Places listings in O'ahu on August 11,1980 as site 80001283. There have been several proposals to demolish the structure, while others argue for its preservation and repair.

The Waikiki Aquarium is a marine science institution in the City and County of Honolulu and the State of Hawai'i. Founded in 1904, this marine aquarium is the third oldest public aquarium in the United States. Since 1919, the Waikiki Aquarium has been an institution of the University of Hawai'i System.

Built near a living coral reef on the Waikiki shoreline, the Waikiki Aquarium is home to more than 3,055 organisms of 464 species of marine plants and animals. Each year, over 350,000 people visit. The Waikiki Aquarium was designated a Coastal Ecosystem Learning Center of the Coastal America Partnership federal program. The Waikiki Aquarium was established on March 19, 1904 by the Honolulu Rapid Transit Authority, a forerunner of the present-day TheBus. It was hoped that the aquarium would entice travelers to ride the trolley all the way to the end of the line at Queen Kapi'olani Park. It was built on land donated by James Bicknell Castle with funds from Charles Montague Cooke and his wife Anna Rice Cooke. The Waikiki Aquarium was the first aquarium in the world to maintain the chambered nautilus and the first to breed them.