Try not to get slimed in Tribeca.

Once the supplier for noteworthy projects like the National Cathedral, this old brickworks now lies abandoned.

An echo chamber with a waterfall wrapped around its base at the Embassy of Canada in Washington, D.C.

On the Fourth of July this area will transform into a Pompeii-like storm of falling embers and ash.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

When it comes to handsignals (and colonialism) rock always beats scissors.

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

The privately owned cemetery that holds room for Washington's finest when they step down from life.

A 1,100-ton train fell through the floor in 1953. Workers got it patched up in just 72 hours.

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

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

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

The oldest continuously operating fish market in the United States.

The national park was once a plantation estate.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

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

The Corinthian columns that towered over Abraham Lincoln’s inauguration stand proud.

Europe's first floating restaurant is home to a hilarious legend.

The entrance to this Frankfurt subway station looks like an old tram car crashed into the concrete sidewalk.

This church on a Tohono O'Odham reservation has stood since 1797.

The site where a plot to assassinate Hitler was planned—and its conspirators were executed—is now a powerful memorial to the German resistance during World War II.

The well-preserved remnants of a bridge that once made up a WW1-era military railroad.

The last of nine massive kilns that produced many of the red bricks for buildings in Washington, D.C. and northern Virginia in the early 20th century.

The first national memorial to honor all women suffragists stands on land where suffragists were once imprisoned.