Lassen Volcanic National Park
National park of the United States.
Each edition grades its towns against each other only.

Whiskeytown-Shasta-Trinity National Recreation Area sees about 764K visitors a year. Look within 40 miles for the 6 places to visit; none is inside Igo. The commonest are 2 museums, a national forest and a national recreation area. A day out reaches Lassen Volcanic National Park, 50 mi away.

National park of the United States.
The towns around it, and where to stay →
Head to the northeast for most of the 6 on the list.
Orange: Igo. Numbers: the best-known places, matching the list below. © OpenStreetMap contributors
These 13 are all within 60 miles.
National park of the United States.
State park in Weaverville, California.
National Recreation Area located in northern California.
Ranked by how many people look them up, so the famous places lead and the local favorites follow.
Lassen Volcanic National Park: en:User:Mav, CC BY-SA 3.0 · Lassen Peak: Frank Schulenburg, CC BY-SA 4.0 · Burney Falls: Dvortygirl, CC BY-SA 3.0 · Shasta–Trinity National Forest: Unknown, CC BY-SA 3.0 · Mossbrae Falls: Pinecar at English Wikipedia, Public domain · Weaverville Joss House State Historic Park: Frank Schulenburg, CC BY-SA 4.0 · Turtle Bay Exploration Park: DimiTalen, CC BY-SA 3.0 · Whiskeytown-Shasta-Trinity National Recreation Area: RoyalMayfair, CC BY-SA 4.0 · Cascade Theatre: Publichall, CC BY-SA 3.0 · Mount Shasta City Park: Daniel Mayer (talk · contribs), CC BY-SA 3.0 · Dunsmuir Botanical Gardens: Daniel Mayer (talk · contribs), CC BY-SA 3.0 · Loomis Museum: DimiTalen, CC BY-SA 3.0 · McConnell Arboretum & Botanical Gardens: Daderot, CC0