Nîmes is a fairly large city in the Languedoc-Roussillon region of southern France, about 35 km north-west of Arles, 50 km west of Avignon and about 60 km north of Saintes-Maries-de-la-Mer, bordering with Provence, having a rich history dating back to the Roman Empire.
There is a good underground parking lot just next to the Arènes de Nimes, it's called Parking des Arènes so we suggest to leave the car there (GPS: 43.836158, 4.363125).
Since you parked the car in the very old town, you can almost immediately admire beautiful Arènes de Nimes (A; GPS: 43.834827, 4.359665) and walk from Place des Arènes to nearby Esplanade Charles-de-Gaulle where you can find amazing Pradier Fountain built in 1851 (B; GPS: 43.834959, 4.362299).
We go to the August Gate (Porte Auguste) (C; GPS: 43.839351, 4.363463) which is the surviving fragment of the city walls. On our way we pass the church of St. Perpetua and Sainte-Felicite (D; GPS: 43.835617, 4.363114), Museum of Natural History (E; GPS: 43.837606, 4.362969) and church of St. Baudile (F; GPS: 43.839351, 4.363887).
Then we go in the direction of Maison Carrée (G; GPS: 43.838194, 4.356076) - one of the best preserved Roman temples in the territory of the Roman Empire. The building is just incredible; it was restored and its beautiful walls are dazzingly white.
Finally, we go to the Jardins de la Fontaine (Gardens of the Source) (J; GPS: 43.839753, 4.349564) - beautiful municipal gardens with many statues and streams of water.