This nine-story building is the oldest standing skyscraper in D.C.

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

Legend has it that President Grant’s frequent drinking in the lobby gave rise to the term “lobbyist.”

The "lovely red Vega" of the legendary record-settling pilot.

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

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

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

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

The oldest continuously operating fish market in the United States.

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

The walls of the iconic dome are hollow and have a secret stairway.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

The United States Capitol's former columns still stand.

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

This massive monument towers over the city as a constant reminder of the lives lost during Algeria's hard-won war for independence.

Deep in the Thar desert, a temple crawling with thousands of holy rats.

The world's second-largest sundial, made entirely out of stone.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

This stunning 15th-century royal hill fort preserves the age of chivalry in Rajasthan.

Once an indicator of social class, the color blue has come to define this city on the edge of the Thar Desert.

Thousands of exquisitely carved stone water storage wells, hundreds of stone steps fill this exquisite medieval stepwell.