One of the now-less-hidden floral gems of the "Emerald Necklace."

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

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

A public art jibe at one of the United States’ oldest and longest-serving senators.

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

Light bulbs, scrap wood, and tinfoil comprise this homemade throne of the gods.

This imposing Masonic temple a mile from the White House was the first public library in Washington, D.C.

Largest Roman Catholic church in North America.

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

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 modern artist's primitive stone faces and unique rock instrument join Iceland's terrain with its history.