Need to find the nearest USPS mailbox? Try the Mailbox Locator (and be sure to use its map feature, to easily make your choice). And yes, USPS offers a similar search (find a collection box) but I found that Mailbox Locator gave me more, and closer, locations than USPS did. The Mailbox Locator is an offshoot of the Payphone Project, run by Mark Thomas. Thanks, Mark!