Views Relationship/Contextual Filter for sibling nodes
There are two ways to do this that come to mind:

Option One

You could create a node template for nodes of type property and use an Entity Field Query in a manner roughly following this pseudo-code:

  $park = $node-&gt;field_park['value'];
  $query = new EntityFieldQuery();
  $query
     -&gt;entityCondition('entity_type', 'node')
    -&gt;entityCondition('bundle', 'property')
    -&gt;propertyCondition('status', 1)
    -&gt;propertyOrderBy('created', 'DESC')
    -&gt;fieldCondition('field_park', $park)
    -&gt;range(0,10);
$result = $query-&gt;execute();


This will load a list the NIDs of all nodes that have field_park matching the value of $node->field_park['value'] (or wherever the node object stores your actual field value). To get more info than just the NID, you will want to do some kind of foreach($result) that does a node_load($nid) on each NID returned by the EFQ.

Option Two

Option two is no-code: you could create a View and embed it on your node with something like Insert View. You would create the view with the following steps:


Add a contextual filter that takes the node ID. This is so you can pass it a value so you get a view specific to each node you want it to appear on. Exactly how to do this is out of the scope of this question.
Add a field for the node title. You can remove this later but it will keep you from getting confused while making the view. Give it a label if you want, make it grouping field number one, and exclude it from the view. 
Add a relationship. Choose "Entity Reference" for the relationship type, and then select "entity that is referenced via field_park" or whatever your node reference field is called.
Add another content: title field. Under relationship, choose the relationship you just created. Set it to group by that field, create a label called "park:", and set it to exclude from display.
Add another relationship. Choose type "Entity Reference" and this time choose "referencing entity": "entity that is referencing Content via field_park"
Add another field for node: title and this time select the relationship you just created. Give it a label like, "sister property:" if you want. 


Violá. Now you have a view that will allow you to pass an NID and will tell you the title of that property, its park, and all sister properties.