Mountain known by the Tillamook Tribe as "the place of the supreme deity."

The largest wooden building in the world now houses a fascinating collection of aircraft.

No one knows how this Pacific Northwest spruce tree came to have so many trunks.

Two massive rock outcroppings on the Oregon coastline.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

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

New Plymouth, Idaho is the only U-shaped town in the United States.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

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

Collecting 700 years of mechanical death-dealing, the NRA's sprawling gun museum is a revealing testament to the American obsession with armament.

Four bald cypress trees in Lafayette Square, across from the White House, mark the southern edge of a 100,000 year old cypress swamp.

A museum dedicated to exhibiting remarkable outsider art.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

The ruins of this Thomas-Jefferson-designed mansion have been left to crumble since the Christmas Day they burnt down.

The only recreation of William Shakespeare's indoor playhouse.

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

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

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.

Parking garage where Bob Woodward met Watergate source "Deep Throat."

This gem-encrusted temple is said to contain some of the Buddha's hair which can make the deaf hear and the blind see.

A precariously perched golden rock defies gravity and brings pilgrims from across Myanmar.

Caves full of Buddhist statues, incredible rock formations and a deserted lagoon.

Home to the deepest rift anywhere on Earth.

Rare and gorgeous birds abound in this protected wildlife sanctuary.