Yes, Nice has a beautiful sea, coast and surrounding nature, but the local architecture also makes the city beautiful.
So many cathedrals and chapels were built here, including one of the cathedrals that Tsar Nicholas II himself contributed to in the 20th century. After the construction was completed, the building was named St. Nicholas Cathedral and still shows Russian Orthodox culture to foreign tourists.
You should also see the Chapel of Mercy and the Church of the Annunciation, which will fully show you French religious architecture.
The advantages of a holiday in the south of France are that you can quickly and cheaply go to other cities and even countries. So you can visit Monaco, getting there by bus for literally 3 euros. Having seen the Principality, and most importantly its capital, you can really understand what luxury is. Here you can look at both historical buildings and the life of the population, and go wild in the casino.