In the Instagram image, Paltrow hugged her look-a-like daughter while Moses clutched a railing next to her, high above the city.
“Good night from the mountains of Barcelona,” Paltrow wrote alongside the photo, in Catalan.
On Friday, Paltrow posted a picture of Apple rocking out next to the stage while Martin performed in the city with band Coldplay.
“Sometimes your dad really needs you to visit him at work,” Paltrow, 43, wrote.
Martin and the actress have continued to keep things amicable since their split after 10 years of marriage, and officially reached a divorce agreement earlier this week, promising in court documents not to ask for spousal support.