Kew Gardens began as a six-acre tract behind a palace, which is hard to believe. It has some of Britain's most famous glasshouses with over 50,000 plants.
The Palmengarten in Frankfurt is a lovely mix of old and new. The Palm House (pictured), erected in 1869 to house the Duke of Nassau's tropical plant collection, was inspired by London and Paris' glass palaces.
Most greenhouses have iron frames, but the Conservatory of Flowers has a wooden frame. The Golden Gate Park conservatory is America's oldest public wooden conservatory.
Tallest building in Belgrade and western Balkans is Belgrade Tower. The observation deck of the 168-m (551 ft) skyscraper offers unparalleled views of Belgrade.
The beautiful Lalbagh Botanical Garden in Bengaluru was commissioned in 1760 by Hyder Ali, king of Mysore (1761–1782). Ali was noted for his lavish gardens.
New York Botanical Garden, near to the Bronx Zoo, was founded in 1891 and finished its beautiful Victorian glasshouse, the Enid A. Haupt Conservatory, 11 years later.
The Oslo Botanical Garden, part of the University of Oslo Natural History Museum, is a 6.5-hectare green oasis in the city. It boasts around 5,500 plant species.