The Arco de Santa Catalina in Antigua Guatemala is a charming yellow arch that once served as a secret passageway for nuns to move between convents without being seen. Built in the 17th century, this iconic landmark underwent renovations after earthquakes in 1773 and continues to be a popular spot for visitors exploring the cobblestone streets of the city. With its historic significance and unique design, the Arco de Santa Catalina is a must-see attraction that adds a touch of magic to the colonial charm of Antigua Guatemala.