A runner taking part in the 38th Annual Empire State Building Run-Up is pictured arriving on the 86th floor in the Manhattan borough of New York February 4, 2015. (Photo by Carlo Allegri/Reuters)

The Empire State Building towers over the Manhattan skyline as tourists gather on the observation deck of Rockefeller Center on February 13, 2012 in New York City. The owner of the Empire State Building, Malkin Holdings, plans to raise up to $1 billion in an initial public offering on the 102 story Manhattan landmark. (Photo by John Moore/Getty Images)

British singer-songwriter Rita Ora visits The Empire State Building on July 09, 2024 in New York City. (Photo by Dimitrios Kambouris/Getty Images for Empire State Realty Trust)

American television personality Stassi Schroeder visits The Empire State Building on April 23, 2025 in New York City. (Photo by John Nacion/Getty Images for Empire State Realty Trust)

Only after World War II did the secret spill: Ōkunoshima, located in the Inland Sea of Japan between Hiroshima and Shikoku, was the top-secret site for manufacturing chemical warfare. When the factories were closed down, a number of exotic wild rabbits were seen freely roaming the island. They were assumed to have been the test subjects for the chemical weapons, which the military failed to eradicate when the factory was demolished.

American actor and musician Jared Leto climbs The Empire State Building on November 08, 2023 in New York City. (Photo by Roy Rochlin/Getty Images for Empire State Realty Trust)

American professional wrestler Jade Cargill visits The Empire State Building on July 31, 2025 in New York City. (Photo by Roy Rochlin/Getty Images for Empire State Realty Trust)