Frankfurt's Palmengarten stretches over 50 acres in the city's Westend, and is home to several sub-tropical conservatories and outdoor gardens. During summer, take the kids for a boat ride on the botanical garden's central lake.
The highlight is the Tropicarium, known the world over for its exotic foliage. It has plants from every type of environment you can think of, from semi-desert regions to mountain rainforest including orchids, bromeliads, cacti and exotic palms.
The Palmenhaus, which dates from 1869, displays a wide range of sub-tropical plants, as well as being the venue for informative temporary exhibitions throughout the year.
Out in the open air, irises, peonies and lilies surround the garden's pond and stream. The park is also the setting for a number of evening festivals and concerts in summer.