After you have slogged up to the top of the dune you can sit and admire the marvelous view. It was a nice day when we were there so it was all very pleasant.
You can see the dune marked on the map below.
Arcachon is a pleasant seaside resort. They rear oysters in the bay. Some of the oyster fishermen have built houses on the Ile aux Oiseaux [Isle of Birds]. You can see some of these in the final photograph. They are built on piles because the island is under water at high tide.