To make DD15 go on this break

[Caleche]

We are visiting family in a Scandinavian city for 2 days / 3 nights. Younger DC have cousins who are similar but older DD has no one and is miserable. After 2 days we are heading to another city where we are staying in a hotel for 2 nights and she isn’t really looking forward to that either.
I feel awful as she’s miserable but did you just drag your teenage DC on breaks and make then suck it up.

It is a phase she’s going through where she wants to be treated like an adult, and thinks she knows best, yet still has much to learn. Plus wanting time alone . Plus hormones.. Hang in there.

Scandinavia has lots of very "cool" cities - are you in the big cities or small towns?

Scandi fashion is very prevalent (Ganni, Stine Hiya, Acne, Stutterheim, etc).There are more alternative neighbourhoods with cool cafes, shops etc - would she enjoy browsing those? If she is 15, she could take herself off to a hipster cafe alone and people watch without an uncool set of parents with her?
More alternative style art galleries to browse?

What is she interested in?

We always did rural holidays as children but my parents switch to city breaks in our mid-teens so that we could explore a bit independently while there (browse shops especially second hand clothes or records, go to a cafe etc alone).