I wouldn't say "rather tired" is a particularly fair assessment - granted I never saw it during the glory years, nor even when the full range of reptile enclosures were on display to the public, but even so I still think it is one of the highlights of the zoo. It will be demolished eventually - none of the zoo is safe from this bar Oakfield Manor and the surrounding stable blocks - but until this happens it should not be looked upon as a crumbling reminder of the past.
In my eyes, we're talking about a spacious and lofty tropical house with over a hundred free-flying birds of about twenty different species, with vegetation which due to the age of the building has reached a level of maturity which is seldom found in houses such as this - and which despite the loss of the great apes once held within, still displays a rather impressive array of other taxa.
Put it this way; not to give out "spoilers" for when my German trip report eventually reaches Leipzig, but in my opinion the Tropical House at Chester beats the much-vaunted "Gondwanaland" hands down.