|The portrait of this young lady is of Mona Lita, the famous detective. Soon after the painting was finished she revealed herself to the artist and apprehended him for forging canvases.|
— In-game description[src]
The treasure is a painting of someone who looks very much like Carmelita Fox in a similar setting to the famous painting by Leonardo da Vinci, the Mona Lisa. It has a wooden frame with golden accents.
Mona Lita was a famous detective that, after the portrait was finished, revealed herself to the artist and arrested him for forgery.
Use the Thief Costume to slow down time if you have it. Head out of the eastern side of the tunnel and go up the cliff using the geyser and paraglider. To the left of the where you will land is a pole that you can climb. It has a rope that will lead you right to the safe house. Rail Sprint is useful here.
|Sly Cooper: Thieves in Time treasure|