The Taj Mahal (Agra). It's surrounded by 10-meter-high walls, and the entrance fee is ludicrously expensive compared to any other attraction in India. If you're in Agra and want to see the Taj Mahal, go across the river. There are some gardens almost directly across from it, and there's a great spot by the river with a brilliant view of the Taj Mahal, particularly at sunset. This experience is totally free, and you won't have to deal with crowds.