Craters of the Moon National Preserve
National monument in the United States.
Each edition grades its towns against each other only.

Nothing is mapped inside Riverside, but 7 places to visit are within 40 miles. There are 3 museums, an ancient site and a ski area to choose from. A longer outing takes you to Craters of the Moon National Preserve, 41 mi off.

National monument in the United States.
The towns around it, and where to stay →
At 33 mi, Pebble Creek is the farthest one out.
Orange: Riverside. Numbers: the best-known places, matching the list below. © OpenStreetMap contributors
Look within 60 miles for all 11.
National monument in the United States.
State park in Power County, Idaho, United States.
Natural history museum in Idaho, United States.
Ranked by how many people look them up, so the famous places lead and the local favorites follow.
Parks and trails in Riverside → · Riverside’s history →
Craters of the Moon National Preserve: Unknown, CC BY-SA 3.0 · Fort Hall: National Park Service photographer, Public domain · Massacre Rocks State Park: Matthew Trump, CC BY-SA 3.0 · Idaho Potato Museum: KRRK at English Wikipedia, CC0 · Museum of Idaho: Jcarr29, CC BY-SA 4.0 · Idaho Museum of Natural History: Abbaby, CC BY-SA 3.0 · Idaho State Arboretum: Michlaovic, Public domain