The Grotto (formally the National Sanctuary of Our Sorrowful Mother) is a 62-acre Catholic shrine and botanical garden in the Northeast Portland neighbourhood of Parkrose, near the airport. The lower level, accessible free of charge, centres on a cave carved into a basalt cliff and contains the marble Pietà replica. Paths wind through rhododendron gardens and meditation chapels among the basalt outcroppings.
A fee elevator rises to the upper level, where a terrace garden gives views over the Columbia River and Mount St Helens. Additional chapels, gardens, and a meditation centre are on the upper level. The annual Christmas Forest of Trees display in December is one of Portland's most popular seasonal events, drawing over 160,000 visitors. Open daily; the upper level elevator adds a modest fee.