One if them is the Hikone castle, one of the oldest original-construction castles in Japan. Here's how the interior looks at the top floor, which can be reached with some effort, by climbing a couple of steep ladders. The most impressive part is the ceiling, a structure made of crooked tree trunks, assembled in a "post and beam" style, providing flexibility and earthquake resistance.
EXIF info:
Nikon D300
Lens: 8-16mm F/4.5-5.6G
Focal Length: 8mm
Aperture: F/7.1
Shutter Speed: 1/60s
ISO Sensitivity: ISO 250