Thunderbirds Tracy's RoundHouse

The Round House — so-called because of its doughnut-shaped appearance — is perhaps the most unusual building to be found on Tracy Island; and is accessed by a path running to the east of the main house (the Tracy Villa).

Built above a sunken, circular Oriental garden, this striking-looking structure provides additional accommodation, guest quarters and leisure facilities, comprising two levels of bedrooms and living areas. An additional, lower level includes utilities, a laundry room, and storage areas.

Like virtually everything else on Tracy Island, though, there's far more to the Round House than meets the eye: it's also the secret cover for Thunderbird 3's enormous, subterranean launch silo.