Barbican Conservatory

The definition of a concrete jungle, this glass-topped conservatory is a surprisingly lush urban rainforest inside the brutalist Barbican, London’s second-largest after Kew Gardens. More than 2000 species of plants, along with fish, birds and terrapins, reside in this space, originally designed to hide the theater's six-story-high rigging system. Free visits are by pre-booked sessions only. Tickets are released one week in advance online on Thursdays at 10am.