[3] Approximately 22 acres (8.9 ha) of wetlands, lakes, restored prairies and two small oak savannas are included within the 87-acre territory.

[4] Only a year after Mayslake Hall was completed, on August 27, 1922, Francis Peabody died of a heart attack during a fox hunt on his property.

The Portiuncula Chapel at the Franciscan Monastery of the Holy Land in America in Washington, D.C. was also built around the same time.

Behind the chapel, a semi-circular memorial wall surrounding a flower and herb garden, was constructed by the Franciscan Order of Friars Minor.

[4] With the assistance of the group's efforts, DuPage County voters approved a $17.5 million referendum providing the Forest Preserve District with funds to purchase Mayslake in 1992.

Mayslake Hall hosts cultural and educational programs throughout the year, including lectures, art classes, and concerts.

[4] The building's architectural elements include decorative half-timbering and groups of tall, narrow windows.

Mayslake Hall features a library, kitchen, private study, numerous bedrooms and bathrooms, servants' quarters, and other rooms.

[4] During years of disrepair, the building suffered significant architectural and structural damage, but is being remediated by a restoration process within Mayslake Hall.