Built in 1910 for oil heir John Teele Pratt and U.S. Congresswoman Ruth Baker Pratt, this Georgian estate hotel is where staff report Mrs. Pratt changing the pub jukebox and a man in a brown suit walking the main hallway.
200 Dosoris Ln, Glen Cove, NY 11542
Research updated June 2026
Age
All Ages
Cost
$$$$
Overnight hotel rates vary by season. Event and conference space available. Check website for current room rates.
Access
Wheelchair OK
Manicured estate grounds; elevator access in main building
Equipment
Photos OK
Est. 1910 · Built 1910 for John Teele Pratt; Charles A. Platt architect · Home of Ruth Baker Pratt — first woman elected to Congress from New York (1928) · One of five surviving Pratt family mansions in Glen Cove · One of the first conference center hotels in the United States (1967)
The Manor was built in 1910 at 200 Dosoris Lane in Glen Cove, designed by architect Charles A. Platt for John Teele Pratt and his wife Ruth Baker Pratt. John Pratt was the son of Charles Pratt, whose oil company was absorbed into Standard Oil, making the Pratt family among the wealthiest on Long Island. The Manor stands as one of five surviving mansions built for sons of Charles Pratt, alongside The Braes (now Webb Institute), Welwyn (Holocaust Memorial and Tolerance Center of Nassau County), Poplar Hill (Glengariff Healthcare), and Killenworth (now the Russian UN delegation's retreat).
Ruth Baker Pratt (1877–1965) was a significant political figure. She became New York City's first female Alderman and in 1928 was elected to the U.S. House of Representatives — the first woman elected to Congress from New York State. She served two terms in Congress and remained a prominent figure in New York Republican politics until her death. She died at The Manor in 1965.
After Ruth Pratt's death the estate was converted into use as a conference hotel in 1967, reportedly one of the first such facilities in the United States. The property operated as Harrison House until 1985 and has since been branded as the Glen Cove Mansion Hotel and Conference Center or The Mansion at Glen Cove.
Sources
The Manor's haunting accounts center on its original owners, both of whom are documented as having died in or closely connected to the property. Ruth Baker Pratt died at the mansion in 1965 after decades of residence; accounts of her presence date to the years following her death.
Front desk receptionist Kim Flammia described seeing apparitions and watching computer monitors shake simultaneously for about 30 seconds — a detail notable for its specificity. A man in a brown suit, identified by staff as John Pratt based on period photographs, has been seen walking the main hallway before disappearing. The figure's appearance in a formal garment matches descriptions across multiple staff accounts.
In Pub 1910, the bar on the ground floor, staff report the jukebox changing songs without human input and the television switching on independently, tuned to crime dramas — an account that investigators Kerriann Flanagan Brosky and Joe Giaquinto documented in their investigation of the property. Brosky characterized the presence as 'someone that loves the house' — benign rather than threatening.
The most physically anomalous detail is the window in Mrs. Pratt's former study: a persistent fog or condensation pattern appears on one pane that staff have not been able to eliminate despite replacing the window multiple times. Orb photographs and EVP recordings have been captured at the location.
Notable Entities
Guest rooms are available throughout the Georgian mansion and its grounds. The pub (Pub 1910), main hallway, and Mrs. Pratt's former study are the most frequently cited locations in haunting accounts. The mansion opened as a conference hotel in 1967 and was one of the first such facilities in the United States.
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