One of the most unique venues in London, the Barbican's Conservatory comes alive at Christmas, as 2,000 tropical plants and dramatic lighting create a magical atmosphere that contrasts with the cold outside. Alice in Winterland packages This year stumble down the rabbit hole into a mysterious world where tropical plants thrive even in the depths of winter and giant fish swim through tranquil pools. Suitable for groups of 150-650, you'd have to be mad as a hatter not to join us!