A headstone tells the sad story of a lost little boy and his pet dog.

A real flying saucer, contracted by the U.S. Air Force.

The largest earthwork effigy in the world.

You can walk through the first Boeing Air Force One, which famously carried JFK's casket from Dallas back to D.C.

How did a massive marine arthropod find its way to landlocked Ohio?

Evidence from a brutal 1880s murder is on display at this former infirmary house.

This presidential tomb was not dedicated until years after Harding's death due to personal controversy.

Featuring one of the most complete and original collections of Presidential memorabilia, this is the site of the last front porch presidential campaigns.

The 25th President's marble casket can be visited in this classical Ohio tomb.

This restaurant proudly displays bread signed by the 39th president.

The "Seinfeld" diner.

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

This chapel on a cliff is renowned for its healing powers and was founded on the site of a supposed divine intervention.

This colorful gate stands as an entrance to the walled city of Old San Juan.

The larger of two volcanic peaks rising out of the crystalline waters of the Caribbean.

Come for the springs; stay for the mud bath.

This huge pile of volcanic boulders hides a stunning network of secret grottoes.

Rumored to be the famed pirate's lookout tower, this historic stone structure is now just watching for tourists.

Inside houses a vast collection of military aircraft and missiles spanning the ages.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.

Look closely and you’ll notice that the color changes a third of the way up the tower.