We rented a house in Lanquin for three nights. Any suggestions how to spend them? Where can a vegetarian eat besides at home? Ithanks
So Lanquin is the only place you'll stay? if that's the case, I'd do a day at Semuc Champey and a day in Coban. Not sure about strictly vegetarian restaurants but there are a few places in Coban that have awesome local fare, including non-meat dishes--try Casa D'Acuna and the wonderful Xcape Koban in Coban.
If you do get to Coban, tour the Finca Maragrita coffee farm--it's lovely.
Three nights in Lanquín? Wow. Having books to read and drinking heavily could work to pass the time. Murder mysteries are cool, because you can just leave them behind when you move on. The day trip to Coban, which might be what #1 is suggesting, will take you close to 2 hours each way.
I am sure the Semuc Chamey pools are on the list. Be sure to explore the Las Maria's caves for high adventure. To get to the caves, just walk up the trail on the opposite site of the bridge. It is good for a couple of hours. Also the Lanquin caves are cool at sunset when the bats fly out. You can lay at the entrance to the cave and let the bats fly over you. It is both cool and creepy.
In Coban, I recommend the Vivero Verapaz for the largest orchid collection in the country. This is an excellent time of year as most of the orchids are in bloom.
There are plenty of smaller villages worth exploring if you have your own car or can manage the collectivo vans.
I'm guessing you already traveled, since this is an old post, but I will be staying at Utopia Eco Lodge. They do not serve meat since it's difficult to get fresh in the area. They serve vegetarian family style meals 3 times a day, ranging from just 20-40 quetzals depending on which meal (breakfast, lunch, or dinner). Maybe this would be an option for you.
As far as activities that haven't been mentioned, there's tubing and swimming.