Since Philadelphia is arranged on a grid system, the mostly one-way roads are easy to navigate. Helpful maps are posted along street corners across the city – watch for the "Walk! Philadelphia" signs ...

The second-largest city in the Lone Star state, San Antonio is located on the southern edge of the mountainous Texas Hill Country. Its streets follow old Spanish trails and 19th-century wagon trails ...

Think of a REST API like a waiter in a restaurant. You (an app) tell the waiter what you want (your request), and the waiter goes to the kitchen (the server) to get it for you. REST is just a set of ...