Add RoadGoat Cities (#1697)

README.md

@@ -554,6 +554,7 @@ API | Description | Auth | HTTPS | CORS |
 | [PostcodeData.nl](http://api.postcodedata.nl/v1/postcode/?postcode=1211EP&streetnumber=60&ref=domeinnaam.nl&type=json) | Provide geolocation data based on postcode for Dutch addresses | No | No | Unknown |
 | [Postcodes.io](https://postcodes.io) | Postcode lookup & Geolocation for the UK | No | Yes | Yes |
 | [REST Countries](https://restcountries.eu) | Get information about countries via a RESTful API | No | Yes | Unknown |
+| [RoadGoat Cities](https://www.roadgoat.com/business/cities-api) | Cities content & photos API | `apiKey` | Yes | No |
 | [SpotSense](https://www.spotsense.io) | Add location based interactions to your mobile app | `apiKey` | Yes | Unknown |
 | [Uebermaps](https://uebermaps.com/api/v2) | Discover and share maps with friends | `apiKey` | Yes | Unknown |
 | [US ZipCode](https://smartystreets.com/docs/cloud/us-zipcode-api) | Validate and append data for any US ZipCode | `apiKey` | Yes | Yes |