Aliwal Park Hotel is 8 minutes away from Bugis MRT Station.
Bugis MRT Station is served by East West Line (Green) and Downtown Line (Blue).
To get to Garden by the Bay, the easier way is to take the Downtown Line (Blue) and alight at at Bayfront MRT Station (CE1/DT16) which is 2 stations away.
Once you exit from the station, take Exit B and follow the underground linkway. Exit and cross the Dragonfly Bridge or Meadow Bridge into Gardens by the Bay