According to the Sims Wiki, "Market lots are community lots and a lot assignment introduced to The Sims 3 in the World Adventures expansion pack. As their name suggests, these lots sell items to Sims.
Markets are fully accessible and not rabbit holes. There are several kinds of market lot, and ultimately what each sells is dictated by the registers on it. The different kinds are: food, general store, relic, and bookstore. Each destination in World Adventures has its own set of markets.
There are two assignments of market lots: Small Market, and Market. The size affects the number of Sims that will visit."
World: China
Name: Shang Simla Market
Size: 31 x 64
Cost: N/A
World: Egypt
Name: Al Simhara Market
Size: 30 x 60
Cost: N/A
World: France
Name: De Goncalves General Store
Size: 20 x 20
Cost: N/A
World: France
Name: Alexis's Relics
Size: 25 x 25
Cost: N/A
World: France
Name: Circle of Knowledge Bookstore
Size: 40 x 30
Cost: N/A
World: France
Name: The Catania Café
Size: 30 x 27
Cost: N/A
Which is your favorite Market?