Some paintings show huge tsunamis. But so far, I've only heard of 7 foot ones or so in my life time.

Do tsunamis ever get near 1000 feet?

What paintings?

One of the highest was the Okushiri, Hokkaidō tsunami which struck Okushiri Island of Hokkaidō within two to five minutes of the earthquake on July 12, 1993, and created waves as much as 30 metres (100 ft) tall—as high as a 10-story building.

I was originally going to respond that it would take a hugely catrastrophic event like a large asteroid impact in mid-ocean to generate a tsunami 1000 feet tall (remember the movie "Deep Impact?"), and that there is no evidence of such an event in recorded human history. But then I ran across this:

Physics of Tsunamis

It mentions a 500-meter tall wave in Lituya Bay, Alaska that was caused by a land slide. More info here:

Biggest Wave

So I defintely learned something today!