A Museum of Garden Escapes has been unveiled on the site of a historic pub in Rainham.
The community garden sits where the Three Crowns Inn, which dates back to the mid-20th century, used to be.
The site was originally home to the Ferry Inn, which was first recorded in 1556.
The Ferry Inn was the landing point for the first ferry from Rainham, used by the Monks of Lesnes Abbey in Erith to transport pilgrims to and from Canterbury Cathedral.
A new covered seating area called The Belvedere has also been revealed.
It has been designed for people to enjoy the views over the River Thames, Havering Council said.
The Belvedere and the Museum of Garden Escapes have been created by the London Riverside Business Improvement District (BID).
The new amenities were made possible through funds secured by the council, in partnership with the London Riverside BID, from the Greater London Authority (GLA) and the Community Infrastructure Levy.
The chairman of the London Riverside BID, Eric Mollison, said: "These public realm improvements are a welcome asset to the Rainham employment zone, the businesses and the 1000-strong workforce that operate from here.
"We’ve worked hard over several years to secure the funding and commitment needed to make this happen and this demonstrates what can be achieved by working in partnership with the council and stakeholders such as the GLA."
Both of the new amenities have been designed "to meet local demand from the area’s workforce for usable outdoor spaces", the council added.
Jonathan Moreland, managing director of MJF Records, said: "We’re delighted to see these two new spaces, which will provide our staff and visitors with somewhere to sit during lunch and tea breaks.
"We're remote here from any amenities, shops or public transport and I know these facilities will be very well used and appreciated."
Deputy mayor for planning and regeneration, Jules Pipe CBE, welcomed the two new spaces.
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