nos·tal·gia
[no-stal-juh, -jee-uh, nuh-]

noun
1. a wistful desire to return in thought or in fact to a former time in one’s life, to one’s home or homeland, or to one’s family and friends; a sentimental yearning for the happiness of a former place or time: a nostalgia for his college days.

2. something that elicits or displays nostalgia.