A diminutive plaque recalls the treetop sniper who almost killed Abe Lincoln.

Dedicated to the man who created the first radio wave communication system.

This chestnut box will not be opened until the country music legend's 100th birthday in 2046.

The world's largest collection of autographed baseballs can be found at the St. Petersburg Museum of History.

The ruins of a sixth-century monastery sit on the banks of the River Shannon.

The location where the American Revolution ended.

An 18th-century townhouse that once hosted guests of the president.

This garden has existed for more than three centuries.

The hippo that stands on this university campus was once a drunken flea market purchase.

This Annapolis home was built by one of the signers of the Declaration of Independence.

A 100-foot metal tower and swinging bridge that provides stunning views of mountains in five states.

One of the last mosaic tile facades found in the city.

This unassuming building houses one of the world's most extensive collections of cars created by automotive legend Carroll Shelby.

The legacy of a wealthy executive and his wife, this little-known art museum features works by Picasso, Monet, Renoir, Cezanne, and more.

Underneath this water pump, Annie Sullivan helped Keller speak her first words.

The National Park Service’s best-kept secret with views that rival any in D.C.

Where one of America's greatest songwriters lived before he was Bob Dylan.

A pop-culture attraction outside of Dyersville, Iowa, hits a home run.

A giant pair of thick black glasses mark the tragic demise of a trio of rock and roll legends.

After the musical legend's death, his memorial was mysteriously graffitied in gold.

This kaleidoscopic mural shows Bob Dylan throughout his transition from young troubadour to Nobel laureate.

A bronze statue on a downtown corner honors Minneapolis's favorite career gal.

Statue in Salem of the woman who starred as the witch Samantha in the sitcom "Bewitched."

Flowers have mysteriously appeared on her effigy every day for the last 150 years.