Mountains, mountains, mountains and still....more mountains. The part of Denver that we stayed in felt relatively flat, but once we drove out a little bit it was obvious we were in the Rockys.
Another cool part of the trip was the tour of the Cave of the Winds. It felt like a very tourist-y spot to visit, but it was still fun. The tour guide led us through cavers, explaining how they came to be, and telling ghost stories. The caves also had very good acoustics (one of the owners wanted to put an orchestra inside).
Of course, when you're in Denver you have to visit the mountains. We spent some time climbing rocks and enjoying the views from atop.
The aquarium in Denver was huge! It had so many different fish and....it also had a tiger! But, really there were so many! Not all were as colorful as this tank, but it was still interesting. The rooms were really decorated and realistic; one room simulated a flashflood with raging waters and a ceiling that simulated a storm. At the end they had a shallow stingray tank were you could softly graze your hands over the fish.
The Hard Rock Cafe was definitely one of the best places we ate in Denver. We tried a lot of different foods, but the burgers here were my favorite.