When the Merchandise Mart opened in 1930, it was the largest building in the world. While it lost this title to the Pentagon, there is no shortage of action within the Merchandise Mart's 4 million square feet of floor space. In fact, SpotHero's offices are located within the Merchandise Mart. Whether you're visiting our office, checking out the latest in home design trends, or enjoying the exceptional Art Deco architecture of the Merchandise Mart - park close and save money on Merchandise Mart parking with SpotHero.