The mansion was built on the site of a previous home called Sonnenberg, German for 'sunny hill'.
The estate features a rare, intact example of a turn-of-the-century Lord & Burnham conservatory complex.
Mary Clark Thompson commissioned the gardens as a memorial to her husband, Frederick Ferris Thompson.
The Japanese Garden was designed by a Japanese garden designer and includes authentic stone lanterns and bridges imported in the early 20th century.
The estate remained a private residence until it was donated to the federal government in 1972.
Many of the original garden design elements reflect the influence of the Arts and Crafts movement.
The mansion interior retains original woodwork and fireplaces despite significant changes in stewardship.
The park is home to a notable collection of historic specimen trees, some of which predate the 1887 mansion construction.
Sonnenberg Gardens & Mansion State Historic Park is a 50-acre Victorian estate overlooking Canandaigua Lake in the Finger Lakes region. The property features a 40-room Queen Anne-style mansion constructed in 1887 for Mary Clark Thompson and Frederick Ferris Thompson. The estate grounds are organized into nine distinct formal gardens, including a Japanese garden, a rose garden, and an Italianate sunken garden. The conservatory complex consists of Lord & Burnham greenhouses originally installed between 1903 and 1915. The site serves as a New York State Historic Park and maintains architecture preserved from the Gilded Age. The mansion offers guided tours focusing on the Thompson family's history and their philanthropic legacy. The grounds utilize a complex irrigation system and historic glass structures to sustain non-native horticultural displays.
The elevated view from the terrace looking down into the Italianate Sunken Garden.
Wear comfortable walking shoes, as the 50-acre property involves significant walking on gravel paths and uneven terrain.
Check the estate's calendar for blooming schedules to prioritize the peak periods of the Rose or Italian gardens.
Bring a portable umbrella, as much of the garden area is fully exposed to sun and rain.
Attempting to walk the entire estate without a water bottle during mid-summer heat.
The park operates on a seasonal basis, generally opening in the spring and closing in late autumn; closed during winter months.
Stay on marked paths to protect delicate plantings; commercial photography requires prior arrangement.
