Twin caves — a cave in Lawrence County, Indiana — is a lesser-known subject for landscape photographers. The nearest town is Mitchell, about 5.6 km (3.5 mi) away (Twin caves lies E of town).
Twin Caves is a pair of cave entrances connected by a short river at the bottom of a sinkhole within the boundaries of Spring Mill State Park in Lawrence County, Indiana, United States. The river is an exposed section of a mostly-underground stream that originates as Mosquito Creek several miles southeast of the park, which sinks into the Upper Twin Cave system. The stream then comes out briefly at Twin Caves, and flows into the Lower Twin Cave, re-emerging briefly at Bronson Cave shortly to the northwest, then flowing into the Shawnee Cave System. The stream finally emerges at the Donaldson Cave entrance as a short tributary of Mill Creek, still within the park. The park offers boat tours from Twin Caves, into the southern cave entrance (Upper Twin Cave). The tours last 20 minutes and go upstream about 500 feet (150 m) into the cave, then turn around due to the rest of the cave...From the Wikipedia article “Twin Caves”, licensed under CC BY-SA 4.0.
Sunrise & sunset directions
At Twin caves the sunrise point swings a long way through the year: about 59° (ENE) at the June solstice and 120° (ESE) in late December. Sunset moves from 302° (WNW) in June to 240° (WSW) in December, and the midday sun climbs to 75° in summer but only 28° in winter.
| Date | Sunrise | Azimuth | Sunset | Azimuth | Noon sun | Daylight |
|---|---|---|---|---|---|---|
| March equinox (Mar 20) | 7:50 AM | 90° E | 7:58 PM | 271° W | 51° | 12h 08m |
| June solstice (Jun 21) | 6:22 AM | 59° ENE | 9:15 PM | 302° WNW | 75° | 14h 53m |
| September equinox (Sep 22) | 7:34 AM | 89° E | 7:44 PM | 271° W | 52° | 12h 10m |
| December solstice (Dec 21) | 8:01 AM | 120° ESE | 5:28 PM | 240° WSW | 28° | 9h 27m |
Azimuth is measured clockwise from true north (90° = east, 270° = west). Computed for 2026; values change by less than a degree from year to year.
Golden hour & blue hour by month
Caves are lit artificially — show caves have fixed lighting, so a fast lens and high ISO beat flash, which flattens formations.
| Month (15th) | Blue hour starts | Sunrise | Golden hour ends | Golden hour starts | Sunset | Blue hour ends | Daylight |
|---|---|---|---|---|---|---|---|
| January | 7:34 AM | 8:03 AM | 8:43 AM | 5:08 PM | 5:48 PM | 6:17 PM | 9h 45m |
| February | 7:10 AM | 7:38 AM | 8:15 AM | 5:47 PM | 6:24 PM | 6:51 PM | 10h 46m |
| March | 7:31 AM | 7:58 AM | 8:33 AM | 7:18 PM | 7:53 PM | 8:19 PM | 11h 55m |
| April | 6:43 AM | 7:10 AM | 7:46 AM | 7:47 PM | 8:22 PM | 8:50 PM | 13h 12m |
| May | 6:05 AM | 6:34 AM | 7:12 AM | 8:13 PM | 8:51 PM | 9:21 PM | 14h 17m |
| June | 5:49 AM | 6:21 AM | 7:01 AM | 8:33 PM | 9:13 PM | 9:45 PM | 14h 52m |
| July | 6:03 AM | 6:34 AM | 7:13 AM | 8:32 PM | 9:11 PM | 9:42 PM | 14h 37m |
| August | 6:32 AM | 7:00 AM | 7:37 AM | 8:05 PM | 8:42 PM | 9:10 PM | 13h 41m |
| September | 7:01 AM | 7:28 AM | 8:03 AM | 7:21 PM | 7:56 PM | 8:22 PM | 12h 28m |
| October | 7:29 AM | 7:55 AM | 8:31 AM | 6:33 PM | 7:09 PM | 7:36 PM | 11h 13m |
| November | 7:00 AM | 7:29 AM | 8:08 AM | 4:54 PM | 5:34 PM | 6:02 PM | 10h 05m |
| December | 7:28 AM | 7:57 AM | 8:39 AM | 4:44 PM | 5:26 PM | 5:56 PM | 9h 29m |
Local time (America/Indiana/Indianapolis), including daylight saving time. Golden hour runs from about −4° to +6° solar altitude, so the morning golden hour begins during blue hour, before sunrise.
Milky Way & night sky
From Twin caves, the Milky Way core is visible in a dark sky from March through September. June gives the longest window (about 5.2 hours on a moonless night), and the core peaks around 22° above the southern horizon. Our light-pollution model puts the sky at about Bortle 4 (rural / suburban transition), good enough for detailed Milky Way images.
| Month | Core visible (15th) | Hours | Max altitude | Direction |
|---|---|---|---|---|
| January | Below 10° in darkness | — | -2° | — |
| February | 5:53 AM – 6:03 AM | 0.2 | 12° | SE → SE |
| March | 5:02 AM – 6:22 AM | 1.3 | 19° | SE → SSE |
| April | 2:58 AM – 5:28 AM | 2.5 | 22° | SE → S |
| May | 12:59 AM – 4:39 AM | 3.7 | 22° | SE → S |
| June | 11:11 PM – 4:21 AM | 5.2 | 22° | SE → SSW |
| July | 11:04 PM – 2:54 AM | 3.8 | 22° | SSE → SW |
| August | 10:21 PM – 12:51 AM | 2.5 | 22° | S → SW |
| September | 9:26 PM – 10:46 PM | 1.3 | 19° | SSW → SW |
| October | 8:37 PM – 8:57 PM | 0.3 | 12° | SW → SW |
| November | Below 10° in darkness | — | 0° | — |
| December | Below 10° in darkness | — | -19° | — |
Window when the galactic core is at least 10° high during astronomical darkness on the 15th of each month. Pick nights within a few days of the new moon. Plan exact nights with the Milky Way planner.
Estimated sky darkness: 4 Bortle 4 — Rural / suburban transition. Light domes are visible in several directions; the Milky Way is clear but lacks detail near the horizon. Modeled zenith brightness ≈ 21.09 mag/arcsec². Aurora needs roughly Kp 7.5+ to show low on the northern horizon here.
Weather & best season
Long-term NASA satellite data for this area show September as the clearest month (about 46% average cloud cover) and February as the cloudiest (70%). July is the warmest month and January the coldest, which matters for gear, snow access and how long batteries last at night.
Average cloud cover (%)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High °F | 67 | 72 | 80 | 83 | 89 | 107 | 107 | 101 | 101 | 94 | 80 | 71 |
| Low °F | -6 | -8 | -1 | 23 | 32 | 42 | 51 | 51 | 38 | 25 | 12 | -8 |
| Precip. (in) | 3.4 | 3.7 | 4.5 | 5.3 | 5.3 | 4.8 | 4.4 | 3.2 | 3.7 | 4.2 | 3.9 | 4.1 |
Monthly climatology for the surrounding 1° grid cell from NASA POWER (MERRA-2). Mountain sites can be colder and cloudier than the cell average.
Photography tips for this cave
- Many show caves restrict tripods on tours; ask in advance or bring a small beanbag.
- Use manual focus with focus peaking in low light.
- Never touch formations — skin oils stop their growth.
- Follow White-nose Syndrome decontamination rules where posted to protect bats.
- Tell someone where you're going in remote areas and carry the ten essentials.
Season: Cave interiors stay at a constant temperature year-round; summer tours fill up, so book ahead.
Suggested gear: Fast lens (f/1.8–f/2.8), High-ISO camera, Small beanbag. Work out exposures with the depth of field, ND filter and NPF rule calculators.
Nearby photo spots
Other locations within 25 km of Twin caves, closest first.
Campgrounds nearby (Recreation.gov)
- Shirley Creek Campground 18.3 km (11.4 mi) · reservable
- Youngs Creek Campground25 km (16 mi) · reservable
- Hickory Ridge Campground30 km (19 mi) · reservable
FAQ
When is the best time to photograph Twin caves?
What time is golden hour at Twin caves?
Where does the sun rise and set at Twin caves?
Can you see the Milky Way from Twin caves?
Do you need a permit to photograph at Twin caves?
How far is Twin caves from Mitchell?
Sources
Location data: Wikidata, Wikipedia. Sun, moon and Milky Way times are computed by LWPhoto Atlas for 2026. Climate: NASA POWER. Sky darkness is a population-based estimate (Walker's law), not a measurement. See data sources & licenses.