After taking this walk, my husband and I will never walk down the streets of Chicago the same. We will be looking at the sides of buildings and walls for fossils that we now know are there in abundance. Truly enjoyable!

This tour was wonderful. I would highly recommend to anyone that enjoys learning, science, good conversation and walking in the city. It was interactive, educational and fun. Teacher/tour guide was amazing and did an excellent job hosting the tour. I would do this again.

This was a great tour! It was fun to learn about the geological history of the Chicago area and find fossils in the buildings all around us. Asa was a fantastic and pantient teacher and gave us all fossils to take home. A+++

Great tour! Learned a lot, great enthusiasm and depth of knowledge.

Another great Fossil tour! Asa took us traveling through time exploring the history of Illinois' rocks. Asa is a wonderful guide and an incredible knowledgeable paleontologist. Thanks again for taking us out rain or shine.

The tour was educational, interesting, and fun. I saw things I'd never noticed despite walking past them countless times. Who would have thought we could see remnants of eons-old life all around us in downtown Chicago!

Asa is a great guide. The fossil tour taught us a lot about different types of rocks and fossils, as well as how to date those rocks based on the fossils found inside of them this guided tour is great for all ages. Our 6-year-old loved it. Looking forward to more Dabble events with Asa and his dinosaur hat!

An eye opening perspective of Chicago and earth history from a very intelligent and enthusiastic teacher. Learned amazing insight and detail about everyday buildings and structures that most people are probably oblivious to.

Very knowledgeable tour guide with a background in Paleontology. 400 million years of history covered in the building stones of Chicago. He identifies fossil species, shows pictures of how they actually looked, and gives background on how they lived in their environment as well as geological events over time leading up to the present Illinois landscape. Loops are provided for close up looks at the fossils. A diverse group added additional information to the walk. Learned a lot about the hidden history surrounding us in the city.

Terrific class and interesting attendees. Asa was wonderfully knowledgeable as he led us along the Chicago River. Who would ever have thought there were so many fossils lurking in downtown Chicago? Our group had a wide range of participants with various level of knowledge. Asa made everyone feel included and everyone learned—and had fun on a beautiful Chicago day.

Awesome experience. Learned a lot of cool things and met a lot of cool people.

This was a fun and very different tour. Learned that there are fossils all around us here in the buildings of Chicago! Very knowledgable guide!

This was a great tour! Asa is a knowledgeable, patient and friendly tour guide. This really opened my eyes to the geology of Chicago!

I brought my 4 yr old son and we both got something out of it. He has some new ideas, like what a million years is, some real fossils he can show other people, and a great hand-out with maps. I got to take a walk with a great group of people and see some fossils that might have otherwise gone unnoticed in the visual noise that is Michigan Ave.

This class was a great way to spend an afternoon - it provided a good overview of rocks & stones along Michigan Avenue, and therefore a different perspective on what's hidden along one of Chicago's most famous strips. As one who likes to play tour guide to friends coming to the city, I've got some great new tidbits to share with upcoming visitors. Peter was very energetic, enthusiastic, and genuinely excited to share his knowledge of geology to the varied ages within the group.