The whole world in one water tank.

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

An unassuming, powerful monument north of the U.S. Capitol bears witness to the resilience of Japanese Americans during a time of grave injustice.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

One of the largest underground systems runs under Canada's largest urban center.

An ancient octagonal weather station named for the eight Greek gods of wind.

One of England's most famous churches hides a pair of little known architectural treasures.

This poor little statue is the most vandalized memorial in Washington.

This sandwich shop has a century-old elevator behind a sheet of plexiglass.

This Viking gravestone carved in a rare runic style was dug up from a London churchyard.

The unique traffic pattern named for an influential urban planner is also known as the Pedestrian Scramble.

One of the largest artillery pieces in the world sits in a Washington D.C. parking lot.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

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

This legendary urban waterfall creates a dazzling display of rainbows.

The Liverpool street made famous by the Beatles is real.

A bronze statue on a downtown corner honors Minneapolis's favorite career gal.

The only Civil War battle in Washington D.C. took place near this highest natural point in the city.

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

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

A traveling postal dog covered 48 states and more than 140,000 miles, and he lives on as taxidermy, patched up with a rabbit's foot and a pig's ear.

Light bulbs, scrap wood, and tinfoil comprise this homemade throne of the gods.

A pre-Industrial Age iron furnace and the site of a nearly-forgotten piece of Black history.

The first bridge observation tower in the U.S. offers one of the best views of Maine.