Yes.
Many times Post Offices have lobby drops for local, metered and stamped. Some have drops for Express Mail.
UPS and USPS will pick the parcel up at your home. You will, however, need proper postage. This can be obtained at your local post office.
Send letters
When the first public mail routes were started in Britain, ornate cast iron poles were erected at intervals along the routes. They were about 5 feet tall with large hooks on either side. Examples can...