SEATTLE — Tourists in Seattle have a new must-see destination: Amazon Go, the cashierless store the company opened near downtown in January.

People who are interested in what is coming next from Amazon, which makes about half of all online retail sales, just need to roam the city. Amazon uses Seattle as a living laboratory, trying out new retail and logistics models .

Some trials never leave the city. But others, like the use of independent contractors to deliver packages, have found their ways to the rest of the country and abroad. The pilots point to a company, with ambitions that at times can seem boundless, investing deeply in figuring out its physical footprint and how to provide convenience at a lower cost.

“Seattle is great for rolling out tests that haven’t been completely debugged,” said Jeff Shulman, a business professor at the University of Washington who hosts a podcast on the city’s culture. In 2015 when Amazon first tested the Treasure Truck, a decorated vehicle that drives around and sells a daily deal like smart watches or plant-based burger patties, it delayed the public debut at least twice before finally going live. The service has since expanded to more than two dozen cities.