"the fountain lay before her, the lakes, the temple and, far away on the last spur, a glittering obelisk"
Temple of the Four Winds, Castle Howard
Creative Commons Attribution Share AlikeTemple of the Four Winds, Castle Howard - Credit: Eirian Evans, Wikimedia Commons

 

The Obelisk at Castle Howard
Creative Commons Attribution Share AlikeThe Obelisk at Castle Howard - Credit: Roger Gilbertson, Wikimedia Commons
The Atlas Fountain, Castle Howard
Creative Commons Attribution Share AlikeThe Atlas Fountain, Castle Howard - Credit: roger geach, Wikimedia Commons

All the features mentioned here can be found at Castle Howard.

There are, in fact, two fountains at Castle Howard: the well known Atlas Fountain and The Prince of Wales Fountain.

The temple at Castle Howard is known as the  Temple of the Four Winds. 

An obelisk is a tall, usually four-sided tapering structure, which may or may not have an interior space.