Birla Planetarium

One of the largest planetariums in Asia, housed in a striking domed building near Victoria Memorial. Daily shows walk you through the solar system and the constellations in several languages (the English one only at certain hours, so check the schedule the day before), and the cool, dark hall makes for a pleasant break on a hot afternoon. A short stroll from Park Street and St. Paul's Cathedral, easy to combine into a single colonial-heritage walk.