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강당골계곡 · Chungcheongnam-do
Open all year round, according to the official listing.

Photos: Korea Tourism Organization (KOGL Type3), shown unaltered.
| Mon | 8:30–18:30 |
|---|---|
| Tue | 8:30–18:30 |
| Wed | 8:30–18:30 |
| Thu | 8:30–18:30 |
| Fri | 8:30–18:30 |
| Sat | 8:30–14:00 |
| Sun | Closed |
| Holiday | Not listed — call ahead |
충청남도 아산시 송악면 송악로 814, 1층
Source: Korea Tourism Organization open API (modified listing as published). Hours can change without notice — please check the official website or call before visiting.