Tallest structure I've seen:
Shanghai Oriental Pearl - 467.9m
Tallest building I've seen:
Kuala Lumpur Petronas Towers - 452m
(been into it but floor 42 only)
Tallest point I've been in a building:
Shanghai Jin Mao Tower observation deck - 340.1m
Tallest building under construction I've seen:
Shanghai World Financial Center - 492m
(but I guess it doesn't count, it was below zero when I saw it

)
Otherwise I've seen:
Menara Kuala Lumpur - 421m (been into it)
2 International Finance Centre, Hong Kong - 415m (seen it from far away only)
CITIC Plaza, Guangzhou - 391m (been into it, but there's not much to see ;-) )
Shun Hing Square, Shenzhen - 384m (been into it)
SEG Plaza, Shenzhen - 355m
Shimao International Plaza - 333m (actually lower, spire was not in place when I saw it)
Eiffel Tower, Paris - 324m (been into it)
Nina Tower, Hong Kong - 319m (seen from far away as well)
Menara Telekom, Kuala Lumpur - 310m (from far away -_- )
Sydney Tower - 309m (been into it)
Plaza 66 Tower 1, Shanghai - 288m
Pudong International Information Port, Shanghai - 288m
Sunjoy Tomorrow Square, Shanghai - 284m
Republic Plaza, Singapore - 280m (been into it)
UOB Plaza, Singapore - 280m
OUB Centre, Singapore - 280m
Hong Kong New World Centre, Shanghai - 278m
Kaifeng TV Tower, Kaifeng - 268m
OK, enough, I'm getting bored now
