Known as both the "Garden City" and "The Silicon Valley of India," Bangalore (officially "Bengaluru") is a techie’s paradise, boasting the highest concentration of IT companies in the country. When you’re done geeking out, there are plenty of gardens, museums, natural features, palaces and temples to fill your dance card. Visit Vidhana Soudha, Cubbon Park and the Ulsoor Lake of Bangalore, well known for its beautiful locales and boating facilities. Bangalore is also a major centre of Indian classical music and dance, and of vivid, cutting-edge nightlife.

Though most simply pass through Coimbatore on their way west, tarriers are rewarded with a lively street-food scene, city museums, and parks. Add in easy access to the hilltop temples surrounding the industrial city, and you have a raw gem waiting to be discovered.

Thrissur is regarded as the cultural capital of Kerala, a beautiful coastal region of southwest India with a history deeply rooted in the spice trade. For an exercise in absolute serenity, schedule an overnight houseboat tour of the local backwaters. If you’re lucky enough to visit during the temple festival of Pooram, you’ll experience lively music performances, fireworks, shadow puppet shows and processionals of beautifully adorned elephants.

The people of Tamil Nadu consider providing food to others a service to humanity. Thus the service in the state capital, Chennai, is first-rate. Treat your senses to some of the richest South Indian flavours in traditional dishes like sambar, rasam, fish curry or kootu. And don't forget to have a cup of full-bodied Tamil coffee, enhanced with chicory—no visit is complete without it.

Look for spicy dishes flavoured with tamarind and coconut in Kochi, and don’t be surprised if your dinner is served up on a banana leaf. The region is a major banana-growing area, and traditional Kochi cuisine employs the fruit in many dishes, both sweet and savoury. Coconut water provides a refreshing and sweet contrast to the piquant food.

The north Indian city of Varanasi, or Benares, is regarded as sacred by Hindus, Buddhists and Jains. Situated in the fertile Ganga valley and on the banks of the Ganges, Varanasi is a place of pilgrimage for Hindus, who come to bathe in the holy river. Known as the City of Temples and a beacon of culture, Varanasi has produced many renowned writers. It’s also a centre of silk weaving, so practise haggling at the chaotic bazaar for some beautiful souvenirs. Rickshaws are the best way to get about.

Though often used as a gateway to nearby beach resorts, Thiruvananthapuram offers plenty of its own to reward travellers who stay. From South Indian cuisine and a sophisticated art scene to architectural treasures and historic landmarks, there’s so much to experience in Kerala’s capital.