Where to visit after Senegal

I am heading to Dakar in September for work and will get to travel the country pretty extensively while I’m there. I always love to tack on a few days after a work trip to take advantage of proximity. I love being at the beach, safaris - really any place that has nice views, good vibes and I can relax. I would be traveling as a solo woman in her 30s. Any suggestions where I should head? Could be a flight or drive away!