In case you wish India & see one of the 7 wonders of world,TAJ MAHAL....these are the recent visa regulations from MOE India.
Citizens of Australia, Brazil, Cambodia, Cook Islands, Djibouti, Fiji, Finland, Germany, Indonesia, Israel, Japan, Jordan, Kenya, Kiribati, Laos, Luxembourg, Marshall Islands, Mauritius, Mexico, Micronesia, Myanmar, Nauru, New Zealand, Niue Island, Norway, Oman, Palau, Palestine, Papua New Guinea, Philippines, Republic of Korea, Russia, Samoa, Singapore, Solomon Islands,Thailand, Tonga, Tuvalu, UAE, Ukraine, USA, Vanuatu, Vietnam can get a "Tourist Visa On Arrival". Its validity would be for 30 days, it would be valid only for single entry and is available only at the international airports at Bangalore, Chennai, Cochin, Delhi, Goa, Hyderabad, Kolkata, Mumbai, Trivendrum. This visa can neither be extended nor converted to any other kind of visa during the stay in India except in certain exceptional circumstances.