The prototype for all Nazi concentration camps.

Rumor has it the uncarved lump behind the three famous suffragists is reserved for the first woman president.

A hidden passageway now marks the site of an assassination attempt on Ronald Reagan that some say broke a 140-year-old curse.

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

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

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

A little marble compass above George Washington's (empty) tomb in the Capitol marks where D.C.'s four quadrants intersect.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

Home to items never before seen by the public.

One of corporate America's best-kept secrets is also one of the most publicly displayed.

A white oak with property rights.

A colorful square marks the heart of the city's LGBTQ community.

One of Savannah's oldest and most haunted cemeteries, featuring graves desecrated by Sherman's Union Army.

This intricate Hindu temple is the largest of its kind outside of India itself and was constructed like a giant puzzle.

Bad farming practices caused this unnatural natural wonder.

A bizarre roadside attraction and the first instance of miniature golf in the world.

More than a century after her death, Little Gracie Watson remains one of Savannah's most often-visited residents.

This haunting tombstone comes complete with a heartbreaking story of love and loss.

This kitschy tavern is also home to rare early editions of "Treasure Island."

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

A New Zealand communications tower stands as the tallest structure in the Southern Hemisphere.

New Zealand's only running funicular railway.

Handcrafted thermal spa washes away each night with the tide.