The Perfect Gift Book for Dads and Grads. Give them a summer of discovery and wonder.
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Hillsboro, Ohio

The Great Serpent Mound

The largest earthwork effigy in the world
39.1950, -83.6115
Old oak tree closeup
Riga, Latvia

The Very Old Oak Tree

A preserved oak tree about 3500 years old found in Riga, Latvia
56.9475, 24.1066
A collection of rocks, fossils and other items from around the US and foreign countries.
Kissimmee, Florida

Monument of States

After the attack on Pearl Harbor, rocks and fossils from every U.S. state were collected into a pyramid of national unity.
28.2916, -81.4046
Hotel Alex Johnson.
Rapid City, South Dakota

Hotel Alex Johnson

One of America’s oldest and spookiest hotels, thanks to the residency of ghosts, dead presidents, and Alfred Hitchcock.
44.0804, -103.2275
San Francisco, California

Camera Obscura & Holograph Collection

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.
37.7783, -122.5142
Montezuma Castle National Monument
Yavapai County, Arizona

Montezuma Castle

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.
34.6116, -111.8351
Bosco the Dog Mayor
Sunol, California

Bosco the Dog Mayor

The black lab that was voted mayor of a California town is forever remembered by a life-size statue
37.5942, -121.8872
Berkeley Mystery Walls
Fremont, California

Berkeley Mystery Walls

Neither Spanish settlers nor anyone since has been able to tell who built these strange California rock walls
37.5117, -121.8777
Shoals, Indiana

Jug Rock

The only freestanding table rock formation east of the Mississippi
38.6769, -86.7980
The Slocum collection
Bloomington, Indiana

Slocum Mechanical Puzzle Collection

The world's largest collection of mechanical puzzles is a cornucopia of analog bafflers
39.1679, -86.5190