Your route .
Frankfurt — 2 nights stay
Arrive in Frankfurt airport. Get transferred to your hotel..
Nordpark's Japanese Garden.
Train ride to Cologne
Cologne — 2 nights stay
Checkout of your hotel. Take your train from Frankfurt to Cologne. Check-in to your new hotel.
Farina Fragrance Museum in Cologne Admission Ticket.
Train ride to Berlin
Berlin — 2 nights stay
Checkout of your hotel. Take your train from Cologne to Berlin. Check-in to your new hotel.
Take your flight back to India. Hope you end up with a lot of memories and a few souvenirs too..