A few teenagers claimed to have witnessed Ed work, reporting that he had caused the blocks of coral to move like hydrogen balloons. The only tool that Leedskalnin spoke of using was a "perpetual motion holder."
The structure comprises numerous megalithic stones (mostly limestone formed from coral), each weighing several tons. It currently serves as a privately operated tourist attraction. Coral Castle is noted for legends surrounding its creation that claim it was built single-handedly by Leedskalnin using reverse magnetism and/or supernatural abilities to move numerous stones weighing many tons and carving them.
According to the Coral Castle's own promotional material, Edward Leedskalnin was jilted by his 16-year-old fiancée Agnes Scuffs in Latvia, just one day before the wedding. Leaving for America, he came down with allegedly terminal tuberculosis, but spontaneously healed, stating that magnets had some effect on his disease.
Leedskalnin originally built the castle, which he named Rock Gate Park, in Florida City, Florida around 1923. He purchased the land from Ruben Moser whose wife helped assist him when he had a very bad bout with tuberculosis.
Florida City, which borders the Everglades, is the southernmost city in the United States that is not on an island. It was an extremely remote location with very little development at the time. The castle remained in Florida City until about 1936 when Leedskalnin decided to move and take the castle with him to its final location on 28655 South Dixie Highway Miami, FL 33033.
The Coral Castle website states that he chose to move in order to protect his privacy when discussion about developing land in the area of the castle started. He spent three years moving the Coral Castle structures 10 miles (16 km) north from Florida City to its current location in Homestead, Florida.
Leedskalnin continued to work on the castle up until his death in 1951. The coral pieces that are part of the newer castle, not among those transported from the original location, were quarried on the property only a few feet away from the southern wall.
Leedskalnin charged visitors ten cents a head to tour the castle grounds. There are signs carved into rocks at the front gate to "Ring Bell Twice" and a second sign just inside the property that says "Adm. 10c Drop Below". He would come down from his living quarters in the second story of the castle tower close to the gate and conduct the tour. Leedskalnin never told anyone who asked him how he made the castle. He would simply answer "It's not difficult if you know how."
When asked why he had built the castle, Leedskalnin would vaguely answer it was for his "Sweet Sixteen." This is widely believed to be a reference to Agnes Scuffs (whose surname is given by some sources as "Skuvst"). In Leedskalnin's own publication A Book in Every Home he implies his "Sweet Sixteen" was more an ideal than a reality. According to a Latvian account, the girl existed, but her name was actually Hermīne Lūsis.
When Leedskalnin became ill in November 1951, he put a sign on the door of the front gate "Going to the Hospital" and took the bus to Jackson Memorial Hospital in Miami. Leedskalnin suffered a stroke at one point, either before he left for the hospital or at the hospital.
He died twenty-eight days later of Pyelonephritis (a kidney infection) at the age of 64. His death certificate noted that his death was a result of "uremia; failure of kidneys, as a result of the infection and abscess."
While the property was being investigated, $3,500 was found among Leedskalnin's personal belongings. Leedskalnin had made his income from conducting tours, selling pamphlets about various subjects (including magnetic currents) and the sale of a portion of his 10-acre property for the construction of U.S. Route 1
Having no will, the castle became the property of his closest living relative in America, a nephew from Michigan named Harry.
The Coral Castle website reports that the nephew was in poor health and he sold the castle to an Illinois family in 1953. However, this story differs from the obituary of a former Coral Castle owner, Julius Levin, a retired jeweler from Chicago, Illinois. The obituary states Levin had purchased the land from the state of Florida in 1952 and may not have been aware there was even a castle on the land.
The new owners changed the name of Rock Gate Park to Coral Castle and turned it into a tourist attraction.
In January 1981, Levin sold the castle to the Coral Castle, Inc. for $175,000. They remain the owners today.
In 1984, the property was listed on the National Register of Historic Places. It was added under the name of "Rock Gate," but the name on the list was changed to "Coral Castle" in 2011.
A view from within Leedskalnin's Coral Castle.
The grounds of Coral Castle consist of 1,100 short tons (1,000 t) of stones in the form of walls, carvings, furniture and a castle tower. Commonly referred to as being made up of coral, it is made of oolite, also known as oolitic limestone.
Oolite is a sedimentary rock composed of small spherical grains of concentrically layered carbonate that may include localized concentrations of fossil shells and coral. Oolite is found throughout southeastern Florida from Palm Beach County to the Florida Keys. Oolite is often found beneath only several inches of topsoil, such as at the Coral Castle site.
The stones are fastened together without mortar. They are set on top of each other using their weight to keep them together. The craftsmanship detail is so skillful and the stones are connected with such precision that no light passes through the joints. The 8-foot (2.4 m) tall vertical stones that make up the perimeter wall have a uniform height. Even with the passage of decades and a direct hit on August 24, 1992, by the Category 5 Hurricane Andrew, the stones have not shifted.
Many of the features and carvings of the castle are notable. Among them are a two-story castle tower that served as Leedskalnin's living quarters (walls consisting of 8-foot high pieces of stone), an accurate sundial, a Polaris telescope, an obelisk, a barbecue, a water well, a fountain, celestial stars and planets, and numerous pieces of furniture. The furniture pieces include a heart-shaped table, a table in the shape of Florida, twenty-five rocking chairs, chairs resembling crescent moons, a bathtub, beds and a throne.
The Thirty Ton Stone.
With few exceptions, the objects are made from single pieces of stone that weigh on average 15 short tons (14 t) each. The largest stone weighs 30 short tons (27 t) and the tallest are two monoliths standing 25 ft (7.6 m) each.
A 9-short-ton (8.2 t) revolving 8-foot tall gate is a famous structure of the castle, documented on the television programs In Search of... and That's Incredible! The gate is carved so that it fits within a quarter of an inch of the walls. It was well-balanced, reportedly so that a child could open it with the push of a finger. The mystery of the gate's perfectly balanced axis and the ease with which it revolved lasted for decades until it stopped working in 1986. In order to remove it, six men and a 50-short-ton crane were used. Once the gate was removed, the engineers discovered how Leedskalnin had centered and balanced it. He had drilled a hole from top to bottom and inserted a metal shaft. The rock rested on an old truck bearing. It was the rusting out of this bearing that resulted in the gate's failure to revolve. Complete with new bearings and shaft, it was set back into place on July 23, 1986. It failed in 2005 and was again repaired, however it does not rotate with the same ease it once did.
The Coral Castle remains a popular tourist attraction with various pop culture speculations regarding how Leedskalnin was able to construct the structure and move stones that weighed many tons. The Coral Castle site states that "if anyone ever questioned Ed about how he moved the blocks of coral, Ed would only reply that he understood the laws of weight and leverage well." He also stated that he had "discovered the secrets of the pyramids", which of course could be interpreted in either esoteric or engineering terms.
disclaimer: All text above was taken from @ Wikipedia.org without alteration.