added a travel app idea

Projects/3-Advanced/Travel-app.md

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+# Application Name
+
+**Tier:**  3-Advanced
+
+Create your travel list with this App. It includes basically a diary of all the places you have visited.
+
+-   This application will help users remember their travels and adventures
+-   Resource needed for the project is countries api, examples include countrysnow, api ninjas countries.
+
+## User Stories
+
+-   [ ] User has to login and have an account to see their data
+-   [ ] User can see their countries they have visited in a list of cards
+-   [ ] User can open a country card to view more info
+-   [ ] User can see a map with all the countries they have visited
+-   [ ] User can organise the cards by asc or desc
+
+## Bonus features
+
+-   [ ] User can add a place as a favourite by setting a radio button
+
+
+## Useful links and resources
+
+-   [CountriesNow Api](https://countriesnow.space/api/v0.1/countries/positions)
+-   [API Ninjas Countries](https://api-ninjas.com/api/country)
+
+## Example projects
+
+[Polar Steps](https://www.polarsteps.com/)