The website YouVisit has virtual tours of over 600 college campuses.
Here’s a list of direct links to many tours, by state:
Alabama
Gadsden State Community College
The University of Alabama in Huntsville
Alaska
Alaska Pacific University
University of Alaska Southeast
University of Alaska Fairbanks
University of Alaska AnchorageArizona
Northern Arizona University 
Grand Canyon University 
University of Arizona 
Pima Community College 
Prescott College Arkansas
University of Arkansas
Northwest Arkansas Community College
Harding University
University of Central Arkansas
University of Arkansas-Fort Smith
John Brown University

California
San Jose State University 
California Baptist University 
San Francisco Art Institute
University of California Los Angeles
Foothill College 
Pepperdine University 
San Diego State University 
Providence Christian College 
Pacific Union College 

Colorado
University of Colorado
Fort Lewis College
Colorado State University
AIMS Community College
University of Northern Colorado
Metropolitan State University of Denver

Connecticut
United States Coast Guard Academy 
University of Saint Joseph 
Yale
University of Bridgeport 
Central Connecticut State University 
Post University

Delaware
University of Delaware

Florida
Brevard Community College
Polk State College
Florida Southwestern State College
Tallahassee Community College
Valencia College
The University of West Florida
Florida Agricultural and Mechanical University
Florida State University

Georgia
Georgia Southern University-Armstrong Campus
Kennesaw State University
Georgia State University
Georgia Institute of Technology
Augusta University
Clayton State University
Clark Atlanta University
North Georgia College and State University

Hawaii
University of Hawaiʻi at Mānoa
Hawai’I Community College

Idaho
University of Idaho
Idaho State University
Northwest Nazarene University
College of Southern Idaho

Illinois
School of the Art Institute of Chicago
Western Illinois University
Columbia College- Chicago
Triton College
Eastern Illinois University
Governors State University
SIU Edwardsville

Indiana
University of Indianapolis
Butler University
Purdue University
Ball State University
Ivy Tech Community College
Indiana State University

Iowa
William Penn University
Iowa Central Community College
Indian Hills Community College
Iowa State University
Kirkwood Community College
Drake University

Kansas
University of Kansas
Garden City Community College
Johnson County Community College
Washburn University
Kansas State University
Friends University

Kentucky
University of Kentucky
University of Louisville
Eastern Kentucky University
Southern Baptist Theological Seminary

Louisiana
Dillard University
McNeese State

Maine
University of Southern Maine
University of New England
Bates College
Husson University
Colby College 
Unity College

Maryland
University of Maryland 
Frostburg State University 
St. Mary’s College of Maryland
Montgomery College
Loyola University
Johns Hopkins University 

Massachusetts
Wentworth Institute of Technology 
Bridgewater State University 
Salem State University 
MassachusettsCollege of Art and Design
Westfield State University 
College of the Holy Cross 
University of Massachusetts Dartmouth

Michigan
Ferris State University
Western Michigan University
Wayne State University
Lawrence Technological University
Northwestern Michigan College
Grand Rapids Community College
Wayne County Community College

Minnesota
University of Minnesota- Twin Cities
Minnesota State University- Mankato
Northland Community and Technical College
University of Minnesota- Morris
Southwest Minnesota State University
Bemidji State University
St. Cloud State University
Minnesota State University- Moorhead

Mississippi
Jackson State University
Jackson Prepatory School

Missouri
Columbia College
Webster University
Missouri State University
Missouri University of Science and Technology
University of Missouri Columbia
Northwest Missouri State University
University of Missouri- St. Louis
University of Central Missouri

Montana
University of Providence
Carroll College

Nebraska
University of Nebraska at Kearney
Doane University
College of Saint Mary
Chadron State College

Nevada
Truckee Meadows Community College
College of Southern Nevada 

New Hampshire
Dartmouth College
Southern New Hampshire University
Keene State College
University of New Hampshire

New Jersey
Princeton
William Paterson University of New Jersey
New Jersey City University
Rutgers University-Newark
Pillar College
Ramapo College of New Jersey
Rowan University

New Mexico
Eastern New Mexico
Santa Fe Community College
University of New Mexico
New Mexico Highlands University

New York
The City College of New York
CUNY Borough of Manhattan Community College
CUNY John Jay College of Criminal Justice
School of Visual Arts
SUNY College at Cortland
Finger Lakes Community College
Fredonia
York College
Niagara County Community College
University at Albany

North Carolina
North Carolina State University
University of North Carolina at Wilmington
University of North Carolina at Charlotte
Fayetteville State University
North Carolina Central University 
Duke University
Appalachian State University
East Carolina University

North Dakota
North Dakota State

Ohio
Mount Carmel College of Nursing
The Ohio State University-Columbus
Ohio University
Edison State Community College
Ohio Technical College
Ohio State University- Newark
Central Ohio Technical College
Kent State University

Oklahoma
Northeastern State University
Oral Roberts University
Tulsa Community College
University of Central Oklahoma
Oklahoma City Community College
Oklahoma State University

Oregon
Oregon State University
Portland Community College
Central Oregon Community College
South Oregon University
Oregon Institute of Technology
Portland State University

Pennsylvania
Penn State
Harrisburg University of Science and Technology
Bucks County Community College 
Central Penn College 
Temple University
Robert Morris University
Lancaster Bible College
Clarion University of Pennsylvania

Rhode Island
Rhode Island College
Roger Williams University 
Brown University 
University of Rhode Island
Bryant University

South Carolina
York Technical College
Winthrop University
University of South Carolina-Beaufort
College of Charleston

South Dakota
Presentation College

Tennessee
Vanderbilt University
University of Memphis
Tennessee State University
Austin Peay State University

Texas
Texas Tech University
Texas Southern University
Texas A&M University-Corpus Christi
Abilene Christian University
Houston Community College
Navarro College
Prairie View A&M University
Texas State Technical College-Waco

Utah
University of Utah
Utah State University
Salt Lake Community College
Weber State University
Westminster College

Vermont
Castleton University 
Landmark College 
Saint Michael’s College 
Norwich University 

Virginia
Bluefield College 
Stratford University
University of Virginia 
Liberty University 
George Mason University 
University of Mary Washington

Washington
Seattle University
Gonzaga University
Central Washington University
Washington State University
Green River College
Western Washington University

West Virginia
West Virginia University Institute of Technology 
West Virginia University 

Wisconsin
University of Wisconsin Whitewater
University of Wisconsin-Milwaukee
Northeast Wisconsin Technical College
Northcentral Technical College
Gateway Technical College
University of Wisconsin-Stevens Point

Wyoming
University of Wyoming