Physician Martin Couney, dubbed 'the incubator doctor', held a sideshow that displayed a genuine life and death struggle of tiny babies. The infant incubator facility on Coney Island was dubbed 'All the World Loves a Baby' and ran from 1903 to 1943. Punters would pay 25 cents to look at the babies - this funded the expensive care they needed.
A midget city, a wild animal show and a bearded lady were all attractions at New York's most insalubrious entertainment park.
But few will be aware of one man's sideshow that not only entertained but saved the lives of thousands of premature babies.
It also changed the course of American medical science.
At the time premature babies were considered genetically inferior, and were simply left to fend for themselves and ultimately die.
Couney offered desperate parents a pioneering solution that was as expensive as it was experimental - and came up with the very unusual way of covering the costs.
For 40 years, from 1903 to 1943, the Jewish-German physician held an infant incubator facility at the amusement park dubbed 'All the World Loves a Baby'.
But behind the gaudy facade, premature babies were fighting for their lives, attended by a team of medical professionals. To see them, punters paid 25 cents.
The public funding - albeit via a crude transaction - paid for the expensive care, which cost about $15 a day in 1903 (the equivalent of $405 today) per incubator.
The incubators themselves were a medical miracle, 40 years ahead of what was being developed in America at that time.
Each incubator was made of steel and glass and stood on legs, about 5ft tall. A water boiler on the outside supplied hot water to a pipe running underneath a bed of mesh, upon which the baby slept.
While on top, a chimney-like device with a revolving fan blew the exhausted air upwards and out of the incubators.
Couney, who had been shunned by the medical world as a tasteless showman told interviewers he would give up his carnival display when there were decent medical alternatives.
At the time, American doctors mostly viewed premature babies as 'genetically inferior'.
This meant that without intervention, the vast majority of babies were likely to die.
Having traveled over from Europe, following several prominent exhibitions, including the 1897 Victorian Era Exhibition in Earls Court, Couney made his name in America.
As well as a facility in Atlanta, he also toured the country giving lectures about his work. He recited the names of notable figures born prematurely who had gone on to do great things.
Among those were Charles Darwin, Sir Isaac Newton, Napoleon, Victor Hugo and Mark Twain.
Though the stall sat side by side with 'freak show' attractions, Couney ran a professional set up.
Popular side show performers appear in the 1930s and 1940s.
An early advocate of breast feeding, if he caught his wet nurses smoking or drinking they were sacked on the spot. He even employed a cook to make healthy meals for them.
In a career spanning nearly half a century he claimed to have saved nearly 6,500 babies with a success rate of 85 per cent, according to the Coney Island History Project.
One such baby was Beth Allen, who was born three months premature in Brooklyn in 1941.
Though her parents initially refused to take their baby there despite their physician's suggestion, Couney came down to the hospital and persuaded them.
Allen told the BBC that they eventually agreed, and every year since her parents took her to see Couney on Father's Day in gratitude. When he died in 1950, they attended his funeral.
Allen said: 'Without Martin Couney I wouldn't have had a life.'