This little offshoot from 12th Street features a nicely landscaped traffic circle and close proximity to the National Mall and The Wharf. Its main draw is the Salamander Hotel, which opened as the Mandarin Oriental Hotel in 2004—a mash-up of those two hotel names yielded this cache's title. You're seeking a magnetic nano.
I hope you enjoy exploring my home, Washington DC! While you're here, check out another cache I hid nearby called Pioneering Women in STEM (GCA6R21).