A day at Four Mile Historic Park is sort of like a day of time-traveling — except there's no DeLorean required, and you don't have to leave this urban oasis smack in the middle of Glendale in order to be transported back to the 1800s. The park is open year-round, and visitors can explore Denver's oldest standing structure, a former stage stop, as well as other authentic cabins and barns, a covered wagon, a tepee and a chicken coop. There's also an orchard and gorgeous swale beyond a peaceful meadow, often the site of special festivals on the holidays.