I visited Antigua in 2010. We enjoyed the architecture, the nature and Guatemalan culture.
The area is dotted with lakes and volcanos. A few hours drive from Antigua, Lake Atitlan is surrounded by volcanic peaks and picturesque villages.
Must sees are City Hall, and surrounding areas, La Merced Church, Santa Catalina arch, and the various markets.
There are wonderful restaurants in the center and at most hotels.
Typical Spanish colonial style window.
Santa Catalina arch