Concierge.com's insider take:
This riverside market is a gold mine for antiques, army gear, old records, communist memorabilia, and bric-a-brac of every kind. The central location along the embankments near the Triple Bridge means that perusing the offerings is an extremely popular pastime for both locals and tourists, so if you see a worthy find, grab it. Haggling is expected, but don't be too aggressive. You might get a discounted price, but it won't be 50 percent off. The stated hours are Sundays from 8 am to 1 pm, but there's a fair chance the vendors will stick around a bit longer on a sunny summer afternoon.
Open Sundays 8 am to 1 pm.