Between 1855 and 1877 O'Brien purchased his father-in-law's share of the land, renamed the land the "O'Brien Estate," and made the beach and the surrounding land available to the public as a picnic ground and amusement resort.
Antara 1855 dan 1877 O'Brien membeli saham tanah ayah iparnya, mengganti namanya menjadi "O'Brien Estate," dan menjadikan pantai dan tanah sekitarnya dibuka untuk umum sebagai sebuah tempat piknik dan resor hiburan.