On this occasional guided walk we track down the unmarked monuments and buried tubes around Greenwich. We seek out their stories of power, pollution and danger.

We start by speeding across the Thames by Clipper from Greenwich Pier to Masthouse Terrace Quay. From there it's a 3 and a half mile 'dot-to-dot' walk as we link together the chimneys above our heads, sometimes tracing the routes of tunnels.

What to expect
The walk gives an insight into the many layers of history that make up Greenwich, through stories about past and present chimneys and tunnels. Tour goers will:

• cross the Thames by Clipper boat and return beneath it through the atmospheric Greenwich Foot Tunnel.
• explore riverside Greenwich and the Isle of Dogs with its spectacular views of the Royal Naval College, and pass through Greenwich Park and the Queen's House.
• learn about the area's industrial history, the largest ship on earth, the early railways, London's smoky smelly past and its tubular infrastructure.
• find out about hidden tunnels, unmarked chimneys, eighteenth century mass-hysteria and other seldom-told stories.
• hear how the powerful – from pier owners to the Astronomers Royal – have influenced the area's development.

The walk starts and ends at the Greenwich Pier ticket office. You will need to arrive a little before 2.15pm to buy a Thames Clipper single ticket to Masthouse Terrace. Alternatively, you can pay for the river crossing with an Oyster card or contactless payment card. The boat leaves at 2.23pm.

The tour price includes a smoky snack. It does not include the cost of the Thames Clipper river crossing ticket.

Suitable for: adults and over 16s. It involves going up and down stairs and crossing roads.

Cancellation policy: We can't offer refunds but given enough notice we may be able to offer a place on another walk.

Note to budding steeplejacks and subterranean explorers: leave your harnesses, torches and hard hats at home! Apart from the descent into one tunnel, we'll keep our feet firmly on ground level as we let our minds wander above and below.

Gift vouchers are available for this and other Dotmaker walks. The walks are also available to private groups.