Acadia National Park
Hearing the thunder here is all about timing. The best time to witness the boom and spray is two hours before high tide. If the ocean is calm or the tide is low, you may just hear gurgling. What causes the thunder? Over eons the restless forces of the ocean has gouged a narrow cave in this granite ledge. This cave traps air when it suddenly fills with water and creates a thunderous burst of ocean spray. Formations like Thunder Hole are just one way to experience the sheer power of these coastal waves and currents.Safety Tips · Stay in designated walkways and viewing areas behind railings and respect gate closures for safe views of Thunder Hole. · Big waves caused by high tides or offshore storms occur without warning and have washed people out to sea. · Black algae and water make shore rocks very slippery. Use extreme caution if walking in these areas.| HM Number | HM20FO |
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| Tags | |
| Placed By | National Park Service |
| Marker Condition | No reports yet |
| Date Added | Saturday, August 5th, 2017 at 1:01pm PDT -07:00 |
| UTM (WGS84 Datum) | 19T E 564688 N 4907826 |
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| Decimal Degrees | 44.32081667, -68.18876667 |
| Degrees and Decimal Minutes | N 44° 19.249', W 68° 11.326' |
| Degrees, Minutes and Seconds | 44° 19' 14.94" N, 68° 11' 19.56" W |
| Driving Directions | Google Maps |
| Area Code(s) | 207 |
| Which side of the road? | Marker is on the right when traveling North |
| Closest Postal Address | At or near Ocean Path, Bar Harbor ME 04609, US |
| Alternative Maps | Google Maps, MapQuest, Bing Maps, Yahoo Maps, MSR Maps, OpenCycleMap, MyTopo Maps, OpenStreetMap |
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