The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

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

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

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

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

It was once the base for a series of domestic terror attacks.

The sculptor was instructed to add “stallion attributes” to the general's bronze mare.

A lover's walk between hilltop towns, decorated with graffiti love notes.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

Carved fountains poignantly placed in parks and in front of special monuments.

An incredible garden taking over the interior of a massive sinkhole.

World War II ended before these tunnels built to protect vital oil from Japanese bombs were ever used.

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

One of the first big sculptures anywhere in Australia.

Relics of Australia's convict past, and a modern scene of unimaginable horror.

The Victoria-era quarantine station for Sydney.

This shrine to film's most iconic wasteland wanderer is located in the very outback where the movies were shot.

This giant dish located in a sheep paddock was the primary receiver of Apollo 11 TV transmissions.

Three-story concrete ram with a permanent gift shop.

A massive metal lobster welcomes tourists to a roadside restaurant.

The decommissioned submarine is now the symbol of a small, inland Australian town.

Popular tourist destination now stands as a memorial to Sam the koala.

Nine limestone rock stacks on Australia's "Shipwreck Coast."