Check out this article on Kerala
Backwaters Honeymoon.

A
honeymoon in the backwaters is undoubtedly the most delightful
experience one can ever have. Kerala certainly deserves the name 'God's
Own Country', with all its golden beaches, palm-fringed seashores,
untouched natural beauty and Kettuvallams, the much-famed houseboats of
Kerala. Cruise through the backwaters of Kerala in these traditional
houseboats and play to the dazzling and delightful moonlight. Live out a
fantasy with the lullaby of the waves and in the arms of each other as
your heart skips a beat with every stirring of the seawater, which is as
deep as your love for each other. You will always cherish the moments
that you spend aboard the giant country crafts that are the
indispensable part of the Kerala's picturesque backwaters.
Once used in Travancore and Kochi and in the Minicoy Islands as a cargo
boat, it is made up of large planks of wood tied together using
hand-made coir ropes and beaten coconut fibers. Seeing the curiosity and
interest they arouse in the tourists, they have now been converted into
a floating luxury dwelling units complete with a suite, one or two bath
attached bedrooms, one living room, kitchenette, an open lounge, deck
and a crew comprising oarsmen, a cook and guide. An ideal sojourn for
the honeymoon couples.