、。
How about sightseeing in Tokyo tomorrow?
Literal
Tomorrow, Tokyo sightseeing [object-を] do [nominalizer-の] [topic-は] how [polite-です] [question-か].
~のはいかがですか = 'how about X?' — a very polite suggestion pattern. いかが is the polite form of どう, used with ですか for a formal 'how is it?' Nominalizing the verb phrase with の makes it a noun to suggest. Common in tourist-guide and hospitality registers.