John and I visited the Marias many times during our stay in Paris. Once we were all geared up to visit the flee markets in the area (near St. Paul), but when we got there we didn't see any; however there were cool little shops that sold antiques and I had a great time browsing through the shelves after shelves of old kitchen gadgets and cafe au lait bowls.
Anyhow, here are some more photos taken from the area:
John and I walked "across the river" to the Marais (district) a couple times. We enjoyed the cool little shops, the "hip and happening" artsy vibe in some of the areas, too.
... and this was the first little part of the district that we saw.