Isaac Bernheim became a notable philanthropist in Louisville. He established the Bernheim Arboretum and Research Forest on in Bullitt County, south of Louisville and from Shepherdsville in 1929. He purchased the land in 1928 at $1 an acre ($247/km²) – the low price being because most of it had been stripped for mining iron ore. The Frederick Law Olmsted landscape architecture firm started work on designing the park in 1931 and it opened in 1950. Bernheim Forest was given to the people of Kentucky in trust and it is the largest privately owned natural area in the state. Bernheim, and his first wife, Amanda are buried at the Bernheim Forest. After Amanda died, Bernheim married her sister, Emma Uri Levy. They lived in Denver, Colorado. The memorial "Let there Be Light" by George Bernard Grey sits over their final resting place. Bernheim's daughter and son-in-law were buried in the forest as well as several other family members.