
Oido Museum sits on Siheung’s tidal flats and interprets prehistoric shell mounds — photograph coastal boardwalks, museum architecture against wide mudflats, and dramatic sunsets/reflections at low tide. Best at sunrise or golden hour for warm sidelight and long shadows; low tide reveals textures and reflective pools. Weekdays and early mornings reduce crowds. Small site with on‑site parking; check opening hours/entry fees before visiting. Bring waterproof shoes for mudflat access and respect ro

Oido Museum sits on Siheung’s tidal flats and interprets prehistoric shell mounds — photograph coastal boardwalks, museum architecture against wide mudflats, and dramatic sunsets/reflections at low tide. Best at sunrise or golden hour for warm sidelight and long shadows; low tide reveals textures and reflective pools. Weekdays and early mornings reduce crowds. Small site with on‑site parking; check opening hours/entry fees before visiting. Bring waterproof shoes for mudflat access and respect ro