It's called the Republic of Molossia and it's a micronation founded humorously by a man named Kevin Baugh as a 'dictatorial banana-republic' in the 1.3 acre area around his house in Dayton Nevada. The micronation consists of Baugh's house, his back and front yards and some other properties that is all surrounded by the state of Nevada.
Molossia started as a childhood project in 1977 and became a 'hobby pushed to the nth degree.' It evolved into a territorial entity in the 1990s. Kevin Baugh even went so far as to create a petition on Whitehouse.gov's We the People requesting formal recognition of the micronation, but didn't gain much traction.
Baugh has embraced his micronation-ness and has installed art and landscape projects around his home that attract interest from outsiders. It's estimated that up to 10, yes TEN, diez tourists visit Molossia every year.