By Lauren Kilberg
November 30,2014; 7:13AM,EST
Gardens by the Bay, Singapore
This three-garden park sits on a waterfront plot of reclaimed land near Marina Bay. Gardens by the Bay is one part in Singapore's transition to being a city in a garden, and within is the Flower Dome, the largest glasshouse in the world (per Guinness World Records). It's one of two cooled conservatories, featuring seven indoor gardens, an olive grove, and a bistro. Within the Cloud Forest, the second of the conservatories, you'll find a man-made mountain that's accessible via elevator and a walking path that takes you past a waterfall.
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Amy Cicconi / Alamy
Phipps Conservatory and Botanical Gardens, Pittsburgh, Pennsylvania
Gifted to the city of Pittsburgh in 1893, the Phipps Conservatory and Botanical Garden is today registered as a National Historic Place. It's not just what's within this 13-room conservatory that's green, though: The complex and its buildings have received a number of top sustainability designations, including LEED Silver and Platinum certifications.
Edward Parker / Alamy
Eden Project, Cornwall, England
A reclaimed Kaolinite pit in Cornwall serves as the home of the Eden Project, consisting of multiple biodomes that house thousands of plant species. The two main domes mimic tropical and Mediterranean climates and support corresponding plant life.
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