Interactive Nuclear Map
 

I very interesting resource

https://outrider.org/nuclear-weapons...&long=2.320582

Indeed: my first try on the application was 3701 Southwest 12th Street, Topeka, Kansas. Pity there's nothing bigger than a TSAR-Bomba.

Well, there is nothing bigger than a TSAR Bomba! :)

The TB was only tested at half strength as they could not work out a way the aircrew delivering the weapon would survive a full power one

One thing to keep in mind, except for the low yield weapons, to be close enough to get a lethal dose of prompt radiation, you have to be well within both the blast radius and the thermal pulse. In other words, most radiation casualties will be from fallout and accumulated exposure. If you survive the initial detonation unhurt, you should make it as long as you get out of the fallout plume and decontaminate - fast.

NUKEMAP is a lot better though.

Much better by far..