Climbing this abandoned railway leads to breathtaking vistas of O‘ahu.

The fountains of the U.S. Navy Memorial are annually salted with water from the Seven Seas as part of a nautical ritual.

Sit where JFK proposed to Jackie or where Nixon dined on meatloaf at this storied pub.

Art deco landmark on the outskirts of Washington, D.C.

A building shaped like the Army Corps of Engineers logo, because why not?

The first presidential bomb shelter was located in an old vault under the Treasury, connected to the White House via tunnel.

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.

Rumor has it the uncarved lump behind the three famous suffragists is reserved for the first woman president.

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

A nostalgic bibliographic gem.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

The oldest arched-covered bridge in Virginia has truly withstood the test of time.

This museum explores the grim reality of life in the earliest British colonies in America.

An overgrown collection of miniature buildings still stand as evidence of one couple's obsession with The King.

Lines from a walking song are etched into a rock in Natural Bridge State Park.

Exact replica of the ancient monument, but much, much lighter.

A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.

A secretive collection featuring objects that were designed specifically for U.S. intelligence operations.

This maze-like slot canyon is a unique gem within an already fascinating geological area.