New Twiddle

application.controller.js

import Ember from 'ember';

export default Ember.Controller.extend({
  somethingDownFromController: null
});

application.route.js

import Ember from 'ember';

const {
  set
} = Ember;

export default Ember.Route.extend({
  actions: {
    sendSomethingUp(something) {
      set(this.controllerFor('application'), 'somethingDownFromController', something);
    }
  }
});

application.template.hbs

<div class="page">
  <aside class="sidebar">
    {{outlet}}
  </aside>
  <div class="content">
    {{places-map
      something=somethingDownFromController
    }}
  </div>
</div>

place.route.js

import Ember from 'ember';

export default Ember.Route.extend({
  model() {
    return {
      somethingFromNestedRoute: 'boooooyaaaaah'
    }
  }
});

place.template.hbs

<hr>

<strong>/place/:id template</strong>

<div>
  <button {{action 'sendSomethingUp' model.somethingFromNestedRoute}}>
    Send model up
  </button>
</div>

places-map.component.js

import Ember from 'ember';

export default Ember.Component.extend({
});

places-map.template.hbs

<hr>

<strong>places-map template</strong>

<div>
  And insert something from the outer context:
  <div>{{something}}</div>
</div>

places.route.js

import Ember from 'ember';

export default Ember.Route.extend({
});

router.js

import Ember from 'ember';
import config from './config/environment';

const Router = Ember.Router.extend({
  location: config.locationType
});

Router.map(function() {
  // You shouldn't need this route. 
  // The index route is the default
  // that gets used. so unless you 
  // need there to be some content 
  // that displays on the initial load,
  // but not on subsequent loads, you
  // don't need the index route.
  
  // this.route('index', { path: '/' });
  this.route('place', { path: "/place/:place_id" });
  this.route('places');
  
  // I'd suggest making these nested:
  //
  // this.route('places', function() {
  //   this.route('show', { path: "/:place_id" });
  // });
});

export default Router;

twiddle.json

{
  "version": "0.5.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.2.0/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.2.0/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.2.0/ember-template-compiler.js"
  }
}