I’ll add more photos now... unfortunately there is no signature.

Dear Caroline,

Thank you for contacting Mearto with your appraisal inquiry.

The presented object appears to be a drawing in watercolor technique with the measurements of 24” x 20”. The drawing depicts an architectural drawing of a villa which reminds of the villas of Andrea Palladio in Italy. This artwork is not signed and was made in the last third of the 20th century.
This piece is in good condition and there are no serious damages visible.
An estimation would be between 100 to 150 USD.
This estimation is based on actual recent past recorded auction sales of comparables. Retail "asking prices" can be higher and vary.

With kind regards,
Georg