Central Denver is flat and walkable with four serious museums inside a few blocks of each other, and the front range of the Rockies starts about 25 minutes west of the last city bus stop.
Denver Art Museum
Two linked buildings at 100 W 14th Ave Pkwy — Gio Ponti's tiled Martin Building and Daniel Libeskind's angular Hamilton Building — with a strong Indigenous Arts of North America collection. General admission is free for everyone 18 and under; ticketed special exhibitions cost extra. The Clyfford Still Museum is across the plaza at 1250 Bannock Street, open Tuesday to Sunday 10am–5pm.
Denver Museum of Nature & Science
At 2001 Colorado Blvd on the east edge of City Park, open daily 9am–5pm and most Fridays until 9pm. Dinosaurs, historic wildlife dioramas and a planetarium; the terrace on the north side looks straight west at the whole Front Range skyline.
Denver Botanic Gardens
The York Street site at 1007 York Street stays open until 8pm in summer and sells timed tickets, so book ahead for a weekend. It is a short walk east of Cheesman Park and the alpine and steppe collections are the ones that actually suit the climate; 720-865-3500.
Meow Wolf Convergence Station
Four-storey immersive art installation at 1338 1st St, tucked under the interchange in the Sun Valley neighbourhood, with more than 70 rooms and hidden passages; most people spend two to three hours. Days and times vary and tickets are timed, and there are periodic 21-plus 'Adulti-Verse' evenings without children.
Denver Union Station
The 1914 station at 1701 Wynkoop, rebuilt as a transit hub with a Great Hall you can sit in for nothing: Terminal Bar under the departures board, the Cooper Lounge up on the mezzanine, and a row of restaurants either side. RTD commuter rail, light rail and buses all leave from here, including the A Line train out to Denver International Airport.