Owned by the Catholic Church, the National Sanctuary of Our Sorrowful Mother, as it's officially known, displays more than 100 statues and shrines in 62 acres of woods. The grotto was carved into the base of a 110-foot cliff, and has a replica of Michelangelo's Pietà. The real treat is found after ascending the cliff face via elevator, as you enter a wonderland of gardens, sculptures, and shrines, and a glass-walled cathedral with an awe-inspiring view of the Columbia River and the Cascades. There's a dazzling Festival of Lights at Christmastime (late November and December), with 500,000 lights and more than 150 holiday concerts in the 600-seat chapel. Daily masses are held here, too. Hours can vary seasonally so call ahead if visiting late in the day.