England’s reliably rainy weather invites a full day of gallery hopping across the capital. A few steps from the hotel, the Institute of Contemporary Arts spotlights all things avant-garde in the modern art world (it has also a worthwhile café and bookshop). On the opposite side of Trafalgar Square, sibling culture houses, the National Gallery and National Portrait Gallery, give you a private audience with such masters as Warhol, Naish, Vermeer, and Monet. As with most London museums, both are free. A short hop, or photo op–filled walk, across the Thames, the Tate Modern is a must-visit for its ever changing installations in the Turbine Hall and exceptional permanent collections, with works from Dalí to Picasso.