Caves around Bad Breisig are primarily characterized by their unique volcanic geology and historical significance. Located in the scenic Rhineland-Palatinate region, the area is known for its proximity to the Trass Caves Brohltal. These formations are a direct result of the powerful Laacher See volcano eruption approximately 13,000 years ago, leaving behind distinctive trass rock. The region also holds historical importance due to centuries of trass mining, which began in Roman times.
Last updated: May 13, 2026
Highlight • Cave
Translated by Google •
Tip by
Highlight • Cave
Translated by Google •
Tip by
Sign up now to discover places like this
Get recommendations on the best single tracks, peaks, & plenty of other exciting outdoor places.
Sign up for free
Highlight • Cave
Translated by Google •
Tip by
Highlight • Cave
Translated by Google •
Tip by
Highlight • Cave
Translated by Google •
Tip by
Sign up for free to discover even more caves around Bad Breisig.
Sign up for free
Already have an account?
Start today with a free account
Your next adventure awaits.
Login or Signup
Popular around Bad Breisig
The Rhine Castle Trail – 13 stages of pure Rhine romanticism
Stunningly beautiful – hiking on the RheinBurgenWeg
D-Route 8: Rhine Route
Germany's Eifelleiter hiking trail – three stages through unique landscapes
Hiking around Bad Breisig
Cycling around Bad Breisig
Road Cycling Routes around Bad Breisig
Running Trails around Bad Breisig
MTB Trails around Bad Breisig
Gravel biking around Bad Breisig
The Trass Caves in the Brohl Valley are deep, branching cave passages made of volcanic trass rock – formed around 13,000 years ago by the eruption of the Laacher See volcano.
2
0
The opening is surrounded by bizarre trass walls and acts like a gateway into the region's volcanic past.
5
0
The small cave was once part of a mine, used during the First World War due to a shortage of raw materials. Today, the entrance is a mysterious spot at the edge of the hiking trail, surrounded by trass rocks and jungle-like vegetation. ⚠️ Caution: The cave is not accessible – there is a risk of collapse.
8
0
The Devil's Bone is a cooled lava flow whose bizarre shape was created by volcanic processes and erosion.
6
0
On the 🧡Dream Trail, dotted with many highlights, this is a real outdoor highlight, practically an adventure playground for adults: Impressive large trass caves...- Endless photo opportunities beckon here📸🎨🖌. Pleasantly cool & refreshing, especially in the warmer summer season🌞🌡. There are also numerous free parking spaces, some of them shaded, next to the large 🚂viaduct🌞🌡
1
0
The freely accessible trass caves in the Brohltal are located below Bad Tönisstein on the Brohltalstraße (Federal Highway 412) at the height of the "Jägerheim" inn. The caves were formerly used by the trass millers: they had the raw material, the freshly cut trass "arks", dried there.[1] There are parking spaces for cars near the caves. The Kell Cave and Gorge Trail, a circular hiking trail, leads past the trass caves. Source: https://www.aw-wiki.de/index.php/Trassh%C3%B6hlen_im_Brohltal
2
0
Great cave passages, don't forget your flashlight
2
0
The caves around Bad Breisig are unique due to their volcanic geology and historical significance. They are primarily Trass Caves Brohltal, formed from volcanic rock (trass) after the powerful Laacher See volcano eruption 13,000 years ago. This trass was also extensively mined since Roman times, making the caves a testament to both natural history and human industry.
Yes, several caves are suitable for families. The Trass Caves Brohltal and Trass Caves in the Brohl Valley – Deep Cave Passages are both categorized as family-friendly. Visitors often find exploring the passages fun for all ages, and the main Trass Caves are spacious enough for those prone to claustrophobia, with the exit often visible.
Beyond the impressive trass rock formations within the caves, the region offers diverse natural beauty. You can experience the dramatic Wolfsschlucht (Wolf Gorge) with its mighty rock faces, lush vegetation, and a picturesque waterfall, creating a 'jungle-like' atmosphere. The Teufelsknochen (Devil's Bone) near Burgbrohl is also a notable remnant of a cooled lava course.
The Trass Caves hold significant historical importance due to centuries of trass mining. Romans first used trass for waterproof mortar, and the industry flourished from the 17th to early 20th century, particularly with Dutch involvement for dike and harbor construction. Exploring the caves allows you to witness the remnants of these extensive mining operations, offering a glimpse into the region's industrial past.
Absolutely. The caves are well-integrated into the region's hiking network. Popular trails like the 'Höhlen- und Schluchtensteig' (Cave and Gorge Trail) and the 'Trasshöhlenweg - Georoute U' allow you to immerse yourself in the geological and historical landscape. Many visitors combine exploring the Trass Caves Brohltal with a hike through the enchanting Wolfsschlucht gorge.
The Trass Caves are publicly accessible year-round, 24 hours a day. This means you can visit them at any time that suits you. However, sturdy footwear is recommended due to varied terrain and potentially damp cave floors, regardless of the season.
Besides exploring the caves and hiking, the area around Bad Breisig offers various outdoor activities. You can find numerous cycling routes, such as those detailed in the Cycling around Bad Breisig guide, or explore running trails, including a difficult 26 km loop around the Trass Caves Brohltal, as highlighted in the Running Trails around Bad Breisig guide. Gravel biking options are also available.
Yes, parking is generally available. For instance, the area around Trass Caves and Viaduct on the Traumpfad is well-suited as a parking lot and starting point for hikes that include the caves.
While the caves themselves are natural formations and generally accessible, specific rules for dogs within the cave passages are not explicitly stated. However, the surrounding hiking trails, such as those through the Wolfsschlucht, are popular for walks and are generally dog-friendly. Always ensure your dog is on a leash and you clean up after them.
The main Trass Caves are generally easy to walk through. However, if you venture into areas like the Deep Cave Passages, they can be low and dark, requiring a flashlight. Trails like the Volcano and Panoramic Trail near Teufelsknochen can be challenging, with some sections secured by ropes. Sturdy footwear is always recommended for the varied terrain.
Visitors particularly enjoy the unique combination of volcanic geology and rich industrial history. The 'jungle-like' atmosphere of the Wolfsschlucht, with its mighty rock faces and waterfall, is a highlight. Many appreciate the accessibility of the caves and the opportunity to combine cave exploration with scenic hikes, creating a memorable outdoor experience.


Extend your search for the best caves by checking out these guides of the top ones around Bad Breisig: