See inside Coe Hall, a 65-room mansion built by a Gilded Age businessman

In the village of Upper Brookville on Long Island, New York, you can step back 100 years — all you need to do is enter the Planting Fields Arboretum, a 409-acre state park that houses an expansive mansion, multiple greenhouses, gardens, and a tea house straight out of a fairy tale.

The mansion, Coe Hall, was built by William Robertson Coe, an executive who succeeded in the insurance and railroad businesses, and his wife, Mai Rogers, an heiress to a fortune built on Standard Oil money. In fact, Coe was the president of the company that brokered the insurance for the hull of what was known as an unsinkable ship: the Titanic. He was even booked on the return voyage of the Titanic from New York City to England, per the Long Island Press.

Coe Hall — the second mansion to be built on the property after the original from 1906 burned down in 1918 — looks like it was transplanted from the English countryside and dropped on the Gold Coast, a stretch of Long Island’s North Shore that earned its nickname for the opulent estates built by wealthy families around the turn of the 20th century.

That’s on purpose, as they wanted to make it seem like the home had been there for decades, making them “old money.”

During my tour of the property this spring, a docent told me some architectural touches didn’t match at the time of construction, as if to give the appearance that the home had been remodeled over the years.

In addition to the main house, which was designed by the architectural firm Walker & Gillette, the arboretum is home to beautiful landscaping and gardens designed by the famous Olmsted Brothers, who also designed Central Park and Oheka Castle.

Here’s what it’s like to visit one of the largest Gold Coast mansions left on Long Island.