[1] Nowadays, the structure functions as a museum, Museo Castillo Serrallés, with information about the sugar cane and rum industries and its impact in the economy of Puerto Rico.

The mansion was emptied in 1956, and while the structure kept in very good shape, the grounds were overgrown by weeds to the point that a total landscaping plan was needed to return the estate to its past glory.

Cerro del Vigía is the name of one of the hills to the north of the city of Ponce that make up the foothills of the Cordillera Central found further inland.

Its location atop the Cerro del Vigía hill makes it visible from nearly every part of the city of Ponce, "as a constant reminder to all Ponceños of their heritage".

[1] The building's location, coupled with its "Y" shape form, allows for an impressive and breath-taking view of the city of Ponce from any one of its eastern, southern, or western elevations.

"[1] According to the Puerto Rico State Historic Preservation Office, "European fashions and lifestyles were usually preferred in this part of the Island...The result of [the] intense cultural interest [of the time] provided work for artists, artisans, and architects whose creations tended to strengthen the image of the ethnic identity...Even though El Castillo Serralles is not based on an indigenous design, its architectural significance lies in the fact that it was designed to adapt well with Caribbean climatic conditions.

Its workmanship, its interior decorations, its furniture, and even its floor plan, reflect the cultural attitudes of the times".

[citation needed] Access to the main entrance to the house from the front street, and leading to the second level of the north elevation, is by way of either of two semi-circular stairways which run from the covered carriage entrance on the ground level of the north elevation.

This leads to double French doors which open into a large vestibule reception area with a ceramic tile floor.

[citation needed] Scenes from the Disney Channel original movie Princess Protection Program were filmed in the castle.