There aren't too many operational funiculars around, but Pittsburgh has two!

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

This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

The only arched bridge made of stone on the entire Mississippi River.

A bronze statue on a downtown corner honors Minneapolis's favorite career gal.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

This Maryland farm is known for its amazing corn mazes and its 30-foot junkbots.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

The maritime museum that boasts the largest nautical library in the western hemisphere.

This old-fashioned carhop restaurant gave the world the waffle cone.

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

This pre-Revolutionary War grist mill ground corn and flour for soldiers in seven American wars.

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

Come for the gun-toting hillbilly madman, stay for the ice-cream loving basketball bears.

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

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

This legendary stone is of unknown origin, and throughout history has been a literal touchstone for British leaders.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

When flour explodes, it's not a pretty sight.

Downtown Minneapolis mixed art and function by turning some of their sewer covers into works of art.

Beautiful Gothic-inspired lighthouse stands out among the run-of-the-mill striped fare on Bodies Island.

The Cadillac Ranch for monster truck aficionados.

This shifting North Carolina sand dune is an odd little desert surrounded by oceanic forest life.