WATER SLIDE through a SHARK TANK!? Hell yeah!!
This huge pool area includes the three story tall water slide (through a freaking shark tank!), a swimming pool that encircles the base of the shark tank, a waterfall, a big hot tub, and lots of options for sitting/laying around and soaking up the desert sunshine. Entry to the main area is free if you're staying at the Nugget or available for a fee if you're not. There are also private cabanas and a VIP area on top for more $$.
On the downside, while the hot tub and deck area are open until 2am the water slide and swimming pool close at 5pm. Also, the entire facility can get so busy during the day that it can be hard to enjoy 'relaxing' here at all-- assuming you can even find a place to sit!
All in all, the Golden Nugget Pool was one of the most fun and inexpensive diversions I've found in Vegas so far. Did I mention that there's a water slide through a shark tank? :-)