Taj Mahal, Agra
Yes, two cards from India back to back on the blog! These cards actually arrived on the same day, which is pretty special considering that India is a relatively rare country on Postcrossing & the cards are both of World Heritage Sites.
The Taj Mahal is a mausoleum built in memory of Emperor Shahjahan's third wife who died in 1631. It was built from 1631 to 1648.