Did you ever think about the connection between house and surroundings? It may seemed casual but take a look to Falling water of famous Frank Lloyd Wright.
If this connection is natural you didn't notice it.
This is one of the oldest proffesion for design of the open spaces. With written documents from 13-14century it has long history at the rize of the civilizatioin.
With the latest technologies the scape of landscape architecture starts from landscape and forest design to vertical and roof gardens.