In Costa Rica's cloud forest, the roots of a woody ficus create a botanical bridge.

You'll find the little birds tucked within the rocks of this Australian beach.

This historic Melbourne bullet factory is fully encased in a massive glass and steel cone.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

The only Civil War battle in Washington D.C. took place near this highest natural point in the city.

An obscure federal monument honors the French diplomat who served as Ambassador to the U.S. during WWI.

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

A Civil War fort in the middle of Washington, D.C. has been swallowed by a forest.

An astounding collection of medical specimens, including bits of President Lincoln.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

The ruins of this long-abandoned unsuccessful gold mine can still be found.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

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

The United States Capitol's former columns still stand.

This lonely waterfront memorial to the men of the Titanic was erected by the "Women of America."

At 207 feet, one of the world's longest continuous escalators.

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

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

The second largest waterfall by volume in the U.S., Willamette Falls is outdone only by Niagara in the amount of water that is pushed northward.

You might know it as the Overlook Hotel, but the inside is not going to be familiar.

A French chateau, failed utopian community, odd museum, and Stonehenge replica in rural Washington State.

Despite a legend that says this highest peak in Oregon was climbed in high heels scores of people have died on its slopes.

An extraordinary mixture of natural beauty and man-made phenomena.