Because plants have long been jealous of our ability to live indoors, they attempt to infiltrate our finest mansions and universities by slowly climbing stony facades. Visit a place built specifically to contain these floral strivers with today's Groupon: for $27, you get a 12-month dual-person membership to the Scott Arboretum (a $55 value).

Formed in 1929, the Scott Arboretum encompasses more than 300 acres of the Swarthmore College campus. The elegantly green grounds showcase more than 4,000 kinds of ornamental plants, including trees, shrubs, vines, and perennials that are compatible with the local climate. Visitors that wrap their green thumbs around today's dual membership will receive many benefits, including admittance to all lectures, discounts on special events, two tickets to the annual tour of the private gardens, issues of the quarterly newsletter Hybrid, access to the Arboretum’s horticultural-literature library, plus opportunities to participate in the community-gardening program.

When preparing to traverse the grounds as a flora explorer, guests can opt to walk on their own or alongside a complementary, complimentary tour guide. For garden gurus and casual front-porch botanists alike, this 12-month dual membership ties in ample amounts of arboretum access, accessible resources, and honest, communal support.