Solo trip Granada/Sevilla

I'll be going on a solo trip to Granada and Sevilla soon and wondered what activities are good recommendations.

Right now I have booked:

\- One flamenco show booked for each city

\- Alhambra and Generalife guide, Granada

\- Boat trip on Guadalquivir, Sevilla

I have four days in Granada and three days in Sevilla. Please give me some recommendations. Thanks!