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The Colgate Clock in Clarksville, Indiana
Clarksville, Indiana

Colgate Clock

The massive, original Colgate Clock is mounted on a defunct factory building that was once a prison.
38.2745, -85.7524
Italian POW Chapel
Franklin, Indiana

Camp Atterbury Prisoner of War Chapel

A chapel built by Italian POWs during World War II tells a forgotten tale of the war on the home front.
39.3757, -86.0683
Santa Claus, Indiana

Santa Claus, Indiana

You thought Santa Claus didn't exist, but it turns out, you were wrong.
38.1127, -86.9173
Lincoln Boyhood National Memorial
Lincoln City, Indiana

Lincoln Boyhood National Memorial

The farm where one of America's greatest leaders was raised is now a well appointed landmark.
38.1135, -86.9961
West Baden Springs, Indiana

Historic West Baden Springs Hotel

A turn-of-the-century architectural marvel built on healing mineral springs and salt licks.
38.5671, -86.6185
Concord, Massachusetts

Walden Pond

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."
42.4405, -71.3345
Philadelphia, Pennsylvania

Edgar Allan Poe National Historic Site

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."
39.9616, -75.1498
Grand Prismatic Spring
Yellowstone National Park, Wyoming

Grand Prismatic Spring

The largest hot spring in the US is, as the name suggests, a stunning show of natural color.
44.5251, -110.8390
Navajo Loop
Bryce, Utah

Bryce Canyon

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."
37.5968, -112.2085
Mammoth Cave, Kentucky

Mammoth Cave

World's longest known cave.
37.2136, -86.1548
Outside the Stanley Hotel in Estes Park, Colorado.
Estes Park, Colorado

The Stanley Hotel

Paranormal experiences in room 217 led Stephen King to write "The Shining."
40.3830, -105.5190
Poised to go sledding at White Sands National Monument.
Tularosa, New Mexico

White Sands National Monument

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.
32.7872, -106.3270
Yellowstone National Park, Wyoming

Morning Glory Pool

A beautiful geyser under enviromental threat.
44.4750, -110.8436
Phantom Ship Rock
Crater Lake, Oregon

Crater Lake

The deepest lake in the United States, and once the site of epic destruction that lives on in myth.
42.9331, -122.1956
Alcatraz from the Bay 2012
San Francisco, California

Alcatraz Island

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.
37.8267, -122.4230
Seattle, Washington

Fremont Troll

A giant Troll lurks under a Seattle bridge overpass.
47.6510, -122.3473
Devils Tower, Wyoming

Devils Tower

The first declared National Monument in the United States.
44.5904, -104.7147
Corbett, Oregon

Multnomah Falls

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.
45.5318, -122.2913
Seattle, Washington

Seattle Underground

A walk through the historic city center, under the streets of Seattle.
47.6015, -122.3343
Dripping Springs, Texas

Hamilton Pool

An emerald-green grotto just a short trip from Austin.
30.3423, -98.1271
Looking down the lobby
Chicago, Illinois

Palmer House Hilton

This historic hotel invented the chocolate brownie.
41.8803, -87.6269
U-505
Chicago, Illinois

U-505

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.
41.7906, -87.5831
Photo of one of the lions from J.H. Patterson's book "The Man-eaters of Tsavo", 1907
Chicago, Illinois

Tsavo Man Eaters

These pretty kitties killed and ate as many as 135 railway workers.
41.8662, -87.6186
Chicago, Illinois

Willis Tower Glass Platform

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.
41.8789, -87.6363