University of Idaho Arboretum and Botanical Garden
Arboretum and botanical garden.
Each edition grades its towns against each other only.

Nez Perce National Historical Park draws about 344K visitors a year. Look within 40 miles and the list grows by 2 beyond the one inside Moscow. There are a garden, a stadium & arena and a national historical park to choose from. Allow a day for Coeur D'Alene Lake, 55 mi off.

Lake in Kootenai County, Idaho, United States.
The towns around it, and where to stay →
Furthest out is Nez Perce National Historical Park, at 21 mi.
Orange: Moscow. Numbers: the best-known places, matching the list below. © OpenStreetMap contributors
One in town leads, with 5 more within 60 miles after it.
Arboretum and botanical garden.
Multi-state U.S. National Historic Park.
The places inside Moscow lead. The rest are ranked by how many people look them up, so the famous places come first and the local favorites follow.
Coeur D'Alene Lake: The original uploader was Jamidwyer at English Wikipedia., CC BY-SA 2.0 · Palouse Falls: Стивен Лю, CC BY-SA 3.0 · Martin Stadium: Jdubman, CC BY-SA 3.0 · Nez Perce National Historical Park: NPS, Public domain