Find great value on Frontier Airlines flights from MKE to DEN when you book with CheapOair! With most of the microbreweries owned by the mayor of the country, Denver is surely different from all parts of the globe. Known as the Mile High City, Denver is resting 5,280 feet above sea level and is a major metropolis. The snow peaked huge rock mountains and world famous attractions set the city apart from others. For your kids to have a great fun day plus a learning experience, take them to the Children’s Museum of Denver that house amazing interactive exhibits. Take a tour of the amazing Colorado State Capitol and the Denver Mint and spend some time unwinding at the Denver Botanic Gardens. Art lovers should not omit visiting the Museum of Contemporary Art Denver and the Denver Art Museum while history buffs should make way to the History Colorado Center.