Or anyone who enjoys such things.

While there you need to drive south about 6 miles to Ohiopyle to see Kentuck Knob. It is another one of Frank Lloyd Wright creation.

Most people don't even know it exists.

You are correct that it's probably not child proof, but it was built in a different time & place. I also encourage a visit to nearby Fort Necessity and a stay at the Summit Inn. It's a cool place to stay. We were there on a foggy September night. Got some great fog photos that night.

Okay, where is the sarcasm thingy.

and why I think he is not a good architect: architects design buildings for people to use, Wright designed memorials to himself (what's that, Mr. Gehry?)

There are two Frank Lloyd Wright buildings in the Buffalo area. I've toured on, Greycliffe, built as a summer home on the shore of Lake Erie for a local executive. Looks nice, great grounds and view of lake - but the windows are single-glazed and uninsulated in the snow belt, making it impractical for all-year use. There's an imposing fireplace made of local shale, a rock that contains a lot of moisture and thus has a tendency to explode when heated. According to the guide, after the first time dinner guests were hit with shrapnel they stopped using it. And the roof leaks.

The other one is the Darwin House, built for the same executive. His wife hated it, found it unlivable, and sold it as soon as she could after his death. It finally re-opened after a couple of decades of restoration. I can't comment on Wright's Larkin Building, which was razed shortly before I was born (I swear I had nothing to do with it!).