Obscure Freemasons still live in D.C.’s largest private residence.

The span is crooked and made from two older recycled bridges.

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

An easily overlooked memorial to a Ukrainian famine-genocide that killed over 4 million people.

This unacceptably tall building was the real reason for Washington, D.C.'s skyscraper ban.

The hidden offices underneath Memorial Bridge have been locked up since 1976.

A rotating cast of guys and dolls in front of a Washington, D.C. building.

A hoard of sky catalogs, astrophysical journals, even the works of Galileo and Copernicus.

An overlooked oasis of quiet on the grounds of Washington's monumental basilica.

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

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

A celebrity from the late Cretaceous period.

There just so happens to be a court even higher than the U.S Supreme Court: a basketball court in the building itself.

There’s a hidden military meme engraved on the World War II Memorial.

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

People escaping slavery may have hidden inside a corpse vault.

You could be standing at the site of one of D.C.'s most fatal tragedies and not even know it.

The most accurate timepiece in the world.

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

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

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

A Spiritualist house of worship where believers communicate with the dead in the spirit world.

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

Largest Roman Catholic church in North America.