This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

Quirky castle designed by the American actor best known for portraying Sherlock Holmes on stage.

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

New York City's smallest piece of private property.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

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

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

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

Before Metro, Washington had a robust streetcar network—and you see the remains of this infrastructure if you know where to look.

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

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

Go take a picture with the inventor of the daguerreotype photographic process.

Perhaps the most scandalous statue of America's first president.

The most accurate timepiece in the world.

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

Largest Roman Catholic church in North America.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

The Byzantine, pre-Columbian, and medieval art at this stately mansion are some of the most under-appreciated collections in D.C.

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

A tiny piece of the Moon is embedded in this stained glass masterpiece.

Home to items never before seen by the public.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.