The Chrysler building was the heighest building in the world
for only a year with 318m. The top is made of a mixture from
cobalt, tungsten, steel and diamond-splinters. This alloy is
regarded as the hardest of the world!
The UN-headquarters isn't build on US-ground but
extra-territorial. It owns
an individual mail and police. The Secretariat building is 154m
high. The office of the secretary-general is on the 38th
floor.
