Bizare block design--old town plats

A standard block layout around here is basically a square or rectangle with an alley running either east to west or north to south through the midline of the block with uniform sized lots on either side of the alley.

Occasionally, there will be both a north to south and east to west alley.

One city has only four lots in the entire block with two north of an east to west alley and two on the south.  Everyone then split the lots into smaller tracts as they chose.

One of the screwier blocks I've found had a square block with two alleys.  The alleys ran along the diagonals.  Most lots had a wedge shape. The ones closest to the block corners were triangles.

Another weird block had a square area offset from the center of the block with alleys shooting out radially to the four sides. This block was at the center of the platted area and was designed with narrow lots for business buildings.  Perhaps this was to allow space for teams and wagons to deliver to the rear of the buildings on all sides of the block without leaving the interior of the block.  Maybe that was to be the planned site for a town well and horse troughs.  Today, there is a large water tower on that square.

What has impressed you in block design?