There are three SE23 entries in this year's Open House weekend on 20th and 21st Septemeber. Here are the details, if anyone's interested in having a nose round...

Horniman Musuem Aquarium. Tours Sunday at 1.45pm and 3.15pm. pre-book only by email to marketing@horniman.ac.uk or ring 020 8291 8168

"New aquarium facing the challenges of building a sustainable eco-system in the basement of a museum. Buttress Fuller Alsop Williams 2006. Entry: aquarium, behind-the-scenes areas."

The Capitol. Saturday/Sun 10am-5pm. Regular architectural tours including behind-the-scenes to largely untouched first floor area. Pre-book only on 020 8291 8920. Last tour 4pm.

"Formerly Capitol Cinema, a grade II listed rare survival of a complete 1020s cinema in Art Deco Egyptian style, later a bingo hall and now a pub. Stanley Beard 1929."

Walter Segal Self Build Houses, 8 & 10 Walters Way, Honor Oak Park. Sunday 12 noon to 5pm. First come basis, queuing outside if necessary. Last entry 4.45pm.

"A close of 13 self-built houses. Each house is unique and built using a method developed by Walter Segal, who led the project in the 1980s. Walter Segal, 1987. Entry, two houses. NB Talks by self-builders, demonstration of self-building and workshop for potential self-builders. Exhibition and film about life and works of Segal."