Hello how may I help you? Whats the tallest building Denver colorado Hm, let me check on that, ok, the tallest building in Denve is the Republis Plaza How tall is it The building is 200 ft tall, can you believe it? That's tall I imagine its a tourist spot Yes, it is indeed! Millions of people go to sightsee every year Wow can you climb it? I wouldn't suggest it! Alright thanks for the information No problem