War of the Worlds is a classic science fiction story about invaders from Mars who attack the Earth in giant tripod machines, but are ultimately wiped out when all of mans weapons fail by bacteria. It has been adapted into movies, TV shows, comics, radio shows (which has become infamous for...
The tripods emerge from the ground
TL;DR the tripods with shields are at least town level, if not city level, and without the shield are at least building level if not higher (they only managed to beat the two they did by targeting the organix interior, and by hitting one which was already dying; even without shields they had several much better durability feats, like bursting out of the ground, surviving explosions, causing whirlpools and surviving capsules ram into them as fast as lightning). However, as far as I remember they have no speed feats.