This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

An artist's cute bronze subway sculptures belie his violent artistic past.

A gift from Japan, 17th-century lantern stands among the cherry trees at D.C.'s Tidal Basin.

Coins and medals straight from the mint await visitors to this shop in the nation's capital.

The National Park Service’s best-kept secret with views that rival any in D.C.

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

A much-maligned monument to teetotalism.

For 60 years, the academy had no permanent location until members voted Washington D.C. as its forever home.

D.C.'s first central library was born out of a chance encounter with the philanthropist whose name it bears.

Prayers and messages of hope decorate the ceramic tiles of this pavilion.

Once connected to the outside world by a single train track, this ghost town is looked after by the National Park Service.

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

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

This beautiful, historic church looks like something out of a simpler past.

This hobbit-y little hot spring may be the oldest spring used by humans in all of Iceland.

A volcanic core jutting above the plain between the Snake and Boise Rivers, a marker identifies the reference point for all U.S. Government Surveys in Idaho.

The largest outdoor art gallery in the Northwest United States.

This work of art by Matthew Mazzotta resides in this park dedicated to the first black legislator in Idaho.

A small section of Boise, Idaho maintains the unique culture and traditions of the Basque people.

When in Idaho, sleep in a giant potato.

A journey begins with a single step, and for many, the road-trip of a lifetime started at this Chicago intersection.

The 72-foot giant escaped confinement in a large patch of mulch only to be reburied in the sandy shores of the Potomac River.

Alexander Hamilton’s creation caused quite a bit of controversy.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.