Brunel Museum Roof Garden
Railway Avenue, Rotherhithe, London SE16 4LF.
Transport: Rotherhithe Overground (one minute’s walk away!)

£5 entry from   http://midnightapothecary.designmynight.com/ 

Voted one of London’s best pop-up cocktail bars since it opened in 2012,
join us for special Saturday events  (and occasional Friday and Sundays) in our secret rooftop garden above
Brunel’s Thames Tunnel in Rotherhithe. 5.30 – 11pm (last orders 10pm).

Relax around a firepit. Imbibe exquisite alcoholic
prescriptions infused with herbs and flowers from the garden or foraged nearby.
Cuddle up to watch the sun set over the river. Toast marshmallows
on the fire. Listen to birds, insects and other local musical talent.
Descend underground into the Brunel Tunnel Grand Entrance Hall
for a guided tour and sate your appetite with great Greek Grill from I Should Be Souvlaki on the terrace.