Come and see my castle!

I'll give you a tour, no hassle.

There's the moat—

Wide enough for a boat.

On top of that ridge

I connected the bridge.

I serve no luncheon

Down in the dungeon.

My enemies will cower

When they see my tall tower,

Atop which sits my flag—

I designed it (I don't mean to brag).

Oh no! Here comes a wave!

Now it's all... sniff... washed away.