The fierce and hot Indiana sun awoke us as it streamed into our tent, baking us inside. We unzipped our tent door and gratefully gulped in the fresh air on the other side. The day had only just begun, and already, there was sweat dripping down my forehead and back. 

Today’s plan was to drive south to Mammoth Cave in Kentucky. We stopped for coffee on the way and listened to our book on tape. When we arrived, we found the parking lot filled almost to capacity. I highly recommend booking your tour ahead of time, which, thankfully, I had the forethought to do before our trip.

We ate a quick lunch at our car and then walked around the air-conditioned discovery center and shop. I particularly enjoyed learning about how the caves formed and the other life forms that live within them. Mammoth Cave was formed naturally through karst topography, or limestone erosion. The caves have been forming since 10,000,000 BCE, when rainwater first began to dissolve the limestone and form the first passages of the cave system. The caves were first explored and mined by Native Americans 5,000 years ago. There are multiple wildlife species that live in the caves, including crayfish, bats and, my personal favorite, the eyeless cave fish. These fish have evolved to the lack of light in the caves by ceasing the growth of their eyes. White in color and only a couple inches in length, these fish can go months without eating and live thirty to forty years! Considering the lifespan of this fish, the amount of time it can go without eating, and its lack of sight, I still find myself thinking about them and wondering how they spend their time.

When the time for our tour arrived, we gathered with our group at a pavilion outside, where we were given our safety instructions and a lantern with a flame dancing inside. We walked down a steep, paved slope together to the mouth of the cave.

The air cooled around us. I pulled on my jacket and held the lantern a little closer. The light faded away, leaving only the artificial lights that had been placed around the cave and the lanterns we held in our hands. We passed by other groups gathered in the cave, who watched with interest as we passed. I had signed us up for the Violet City Lantern Tour, the only tour in the cave that is done entirely in lantern light, just as early explorers would have seen the caves.

As we delved deeper into the cave system, all other lights faded away. We walked with our lanterns held at our sides, our eyes flitting around the dark cave walls as they adjusted to the dim light. We could see very little than the few feet around us, lit by the warm glow. The wide trails narrowed into winding dirt paths, the same historic trails early explorers followed. While we walked, our tour guide told us more about the history of the caves. We passed small, stone huts, and our guide told us about the tuberculosis patients who were “treated” here because it was believed there was something special about the clean and cool cave air. We learned about the dangers early explorers faced and the Kentucky Cave Wars, when developers and promoters of the cave fought over tourists to show them their section of the cave system. We peered at ancient drawings and gaped down at steep drops beside our feet that seemed to end in nothingness. 

The tour lasted a total of three hours, but the time passed quicker than expected. I was shocked by the sticky warmth that greeted us when we emerged from the caves at the edge of a road surrounded by thick, green foliage. A tired bus chugged up the hill to meet us. 

We rode back to the visitors center and then hopped back into our car to drive to the edge of Kentucky and Indiana, where our first and only Airbnb of the trip was located. I am always surprised at how luxurious showers feel after days of going without one. Despite the heat outside, I could not help myself from turning the water to scalding and relaxing in its spray.

We dressed in clean clothes and drove to Louisville, KY, where we strode across the Big Four Pedestrian Bridge back into Jeffersonville, IN. As we walked, we watched the orange sun dip behind the clouds as we listened to classical music playing from speakers overhead. 

In Jeffersonville, we decided to dine at Harry’s Tap House, where we could sit outside and watch the bridge light up as the sky darkened. We were served by a young, blonde woman with a thick Kentucky accent. To drink, I ordered a summertime sangria made with peach schnapps and sweet peach puree. For an appetizer, we chose the pretzel and beer cheese – the fried Klaus pretzel, made by a renowned local baker in Louisville, was served hot with a creamy house-made beer cheese dip. I am sorry to say this, because I have visited Pennsylvania on numerous occasions and always ordered a famous Philly pretzel, but I think it was the best pretzel I have ever eaten. Crisp on the outside, soft on the inside, with the perfect, mouth-watering amount of salt, it melted against my tongue and felt warm in my chest. I wished I had ordered three more and just had that for my meal.

For dinner, I ordered the mango bourbon salmon, a chilean salmon served with refreshing mango salsa. It was served with a sweet Thai broccoli smothered in sauce, and in place of the rice, I ordered a side of Brussels sprouts that were also drenched in an Asian sauce. Joseph ordered the smokehouse burger, which was a half pound burger served with crispy bacon, smoked cheddar cheese, beer battered onion rings, and tangy barbecue sauce. 

Stomachs bursting, we walked back to the Big Four Pedestrian Bridge, which was now lit up against the night sky. I savored the walk across, taking in the view of the skyline beneath the white moon and the blue lights of the bridge that glittered against the black water below.

It was amazing to go in one day from marveling at the walls of a cave to gazing at the tall buildings of a city – a wonder created by nature, and another created by man. Our travels have not yet taken us outside of the United States, and I find myself often wishing to see something truly old. Most of what we have seen in our travels has been created within the last couple hundred years, whereas, in countries like Europe, you could marvel at a building that is centuries old. Today, however, I was reminded that, even if our buildings had not been erected that long ago, we still have structures here that are just as ancient – mountains, rivers, trees and caves. And that made me wonder just how many parts of nature I see regularly, even around my own home, and take for granted. I wonder how long the trees in my backyard have stood there, how long the rivers gushing around my home have existed, how many others have walked this land before me, and how different it must have looked then. 

There is something amazing to be seen anywhere, if only we take the time to look. And sometimes, we may be surprised to discover the wonders we are looking for are actually hidden beneath our feet.