There's no grander library in Singapore than the Rotunda Gallery & Archives. Nestled within the National Gallery Singapore, this museum library stuns with Roman-style columns that reach up towards a domed ceiling, where natural light pours through a ring of arched windows. This hidden gem is home to an extensive collection of books and exhibition catalogues on Southeast Asian modern art, painstakingly built up through years of donations, partnerships and exchanges with libraries around the world. While researchers have the most reason to visit the Rotunda Library, the place is also open to walk-in visitors on weekdays, who are free to check out the collection and relax in quiet reading nooks dotted about the space.