The most decorated dog of World War I is preserved in the Smithsonian.

The Lincoln Memorial has inspired many, even though a word on the inscription appears to be spelled incorrectly.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

An overlooked memorial honoring the local Washington residents who died in World War I.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

A wall of chewing gum moonlights as collective art.

Once a slice of Cold War-era military history, this museum is finding its future in the stars.

Community bookshelf of 25-foot-tall book spines.

This recently restored timepiece has stood all around Kansas City.

Prehistoric animals decorate this popular outdoor park.

One of the few surviving "Wigwam"-themed motels.

The world's longest known cave system.

This Indianapolis landmark offers a secret panoramic view of the city. 

A tunnel that brings more than a century of history to life from the deepest parts of the Niagara Gorge.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

Once the extravagant escape of the Ford family, this enigmatic ruin now stands as a haunting reminder of its former glory.

World's largest Christmas store.

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

These dramatic cola-colored falls have appeared in a poem by Henry Wadsworth Longfellow and a song by Sufjan Stevens.

Two dozen rescued bears roam (mostly) free at the largest bear ranch in the U.S.

As its grandiose name implies, this wooden dome is unsurpassed in size.

"The Most Boring Road in the State."

This lighthouse and shipwreck museum keep a torch burning for the memory of the SS Edmund Fitzgerald.

Beautiful scenery, history, science, and physics come together in this remnant of shipping lore.