Like most riverboats, the hub of onboard life on AmaPrima takes place in the sprawling lounge. There's a semi-circular bar, a small library nook with a faux fireplace, a handful of tables at perfect height for writing letters or checking email, and a vast array of deep and comfortable couches and armchairs. There's also a closet-sized gift shop.
The beautiful lobby area, which spans two decks, is home to the cruise director's desk (he arranges onboard and in-port activities), a reception desk and an elevator that travels between the restaurant and the lounge decks. Because of marine regulations, elevators can't travel below the water line or to the sun deck. (That means cabins on the lowest deck, Piano Deck, are only accessible via the stairs.)
On riverboats, the top-most level -- the sun deck -- is, essentially, an extension of its lounge area, and AmaPrima's Sun Deck is one of the most beautiful and comfortable in the industry. There are plenty of tables and chairs for playing games, writing letters and eating, and there's a gorgeous sitting area with deep wicker-like sofas just forward of the bridge. The Sun Deck also has canopied areas for shade, with plenty of mesh-covered loungers.