The Taj Mahal is a landmark mausoleum in India.
Benny Russell once thought that his New York City apartment seemed like the Taj Mahal compared to Jenny's. (DS9 novelization: Far Beyond the Stars)
In an alternate timeline, Khan Noonien Singh's funeral ceremony was conducted at the Taj Mahal in 2172. (DS9 - Myriad Universes novel: Seeds of Dissent)