Phipps Conservatory and Botanical Gardens

Not to be trite, but the Phipps Conservatory and Botanical Gardens in Pittsburgh are an absolute must-see. The approach is made up of sustainable, perennial gardens, framing the beautiful conservatory building at center, which houses the Victorian-inspired Palm Court and Sunken Gardens. In addition to a host of brilliant tropical flora indoors, including an orchid room, there's also an outdoor garden offering dramatic cityscape views.