Cats love high places, that's why they love to climb trees. And sometimes get stuck in them. These gorgeous kitty tree houses from PetTreeHouses provide all the fun and none of the risk to those felines who jones for altitude. Each treehouse is custom made and, from what I can tell, they're constructed around REAL trees (even though they look faux). As you can image, they aren't cheap. The big one pictured above clocks in at $875 and the smaller one below is $475. You can see all of PetTreeHouse's items here.