Sludge Pit Hole

Don't let the rather unappetizing name put you off - this cave system near Wells offers a proper underground adventure for anyone willing to get a bit muddy. The entrance drops into a series of chambers and passages that require some scrambling and crawling, making it strictly for those comfortable with tight spaces and getting their hands dirty.

Serious cavers will find the most to appreciate here, though older kids with a sense of adventure might enjoy the challenge too. You'll need proper caving gear - helmet, lights, and clothes you don't mind sacrificing to the Somerset clay. The system isn't huge, but it's technical enough to keep experienced spelunkers occupied for a couple of hours.

Access details are sketchy, so best to contact local caving groups for current conditions and permissions. It's not a casual tourist attraction like Wookey Hole - this is the real deal for those who know what they're doing underground.

If you're staying at one of the holiday parks around Wells like Cheddar Camping or Bucklegrove Holiday Park, it makes a good addition to exploring the area's more famous caves. Just don't expect gift shops or guided tours - bring your sense of adventure and leave the squeamish behind.