Near Bar Harbor in Hancock County, Maine — The American Northeast (New England)
Sounds of the Sea
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.
• 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.
Erected by National Park Service.
Topics. This historical marker is listed in this topic list: Natural Features.
Location. 44° 19.249′ N, 68° 11.326′ Touch for map. Marker is in this post office area: Bar Harbor ME 04609, United States of America. Touch for directions.
Other nearby markers. At least 8 other markers are within walking distance of this marker. Icy Depths (here, next to this marker); Thunder Hole Ranger Station (within shouting distance of this marker); What Do Park Rangers Do? (within shouting distance of this marker); Thunder Hole (about 400 feet away, measured in a direct line); “Hot Line” to Europe (approx. 0.6 miles away); Alessandro Fabbri, Lieutenant, U.S.N.R.F. (approx. 0.6 miles away); Once a Busy Waterfront (approx. 0.6 miles away); Satterlee Field (approx. 0.6 miles away). Touch for a list and map of all markers in Bar Harbor.
More about this marker. The background of the marker contains of a photo of waves crashing into Thunder Hole and includes a caption of “This photo captures the raw power of the ocean at Thunder Hole.”
Credits. This page was last revised on August 5, 2017. It was originally submitted on August 5, 2017, by Bill Coughlin of Woodland Park, New Jersey. This page has been viewed 114 times since then and 13 times this year. Photos: 1, 2, 3, 4. submitted on August 5, 2017, by Bill Coughlin of Woodland Park, New Jersey.