Iconsiam SookSiam in Bangkok's Khlong San riverside mall is the indoor floating-market food hall, with 100 stalls representing all four regions of Thailand.
Tip: Tokenless cashless payment via the Iconsiam app. Each section pulls from a different region, from southern Thai to northern Lanna.
Sampeng Lane in Bangkok's Yaowarat Chinatown is the 250-year-old daytime wholesale alley for dried goods, Chinese-Thai pastes and bird's-nest soup vendors.
Tip: Daytime trade only; closes by 17:00 before the night market kicks in. Wholesale prices apply for bulk purchases.