The bones of prehistoric animals and early signs of human habitation have been found inside Malta's "cave of darkness."

One of Malta’s most popular beaches features a seemingly out-of-place statue of the Virgin Mary and baby Jesus.

The oldest continuously operating fish market in the United States.

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

A heroic pigeon that, through a barrage of gunfire, delivered a message that saved over 100 lives in World War I.

This taxidermy horse was a Civil War hero.

Perhaps the most scandalous statue of America's first president.

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

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

This statue of the "father of television" stands prominently in the United States Capitol.

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

"Congress may voluntarily remain in session throughout the summer, in order that our Congressmen may be protected from the intolerable discomforts and dangers of the ordinary outdoor weather!”

This lovely pocket park is one of the most under appreciated in D.C.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

The third version of this tall sailing ship sits, rusted and burnt, in Lake Ontario.

Around 160 years ago, this spot marked the location of a wharf along the shores of the Charles River.

19th-century operating theatre in which the use of ether was first demonstrated - plus, a skeleton and a mummy!

This pavement line and accompanying statue commemorates the starting point for the world's oldest annual marathon.

Washington's iconic carousel has a nice piece of Civil Rights history.

The Cape of Good Hope is not quite as low as you can go on the African continent, but it's still geographically significant.

This neolithic stone was once used for ceremonial practices similar to its neighbor Stonehenge.

This memorial park is also the original site of Queen Cleopatra’s Caesareum, whose pillars now stand in London and New York.

This landmark honoring a local beer brand is an iconic part of the Minneapolis skyline.

Ozymandias’ time-keeping temple.