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

At the most northwestern point of the contiguous United States lies a trail leading through an ancient forest to stunning cliff-side vistas and massive oceanside caves.

A massive sea stack famous for its appearance in The Goonies.

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

Only known mainland rookery of the threatened Stellar sea lion.

Stripes of flowers bloom each spring in a 50 acre rainbow of color.

These Great Lakes sea caves accessible by boat in the summer turn into temples of ice reachable by foot in the winter.

Half of a waterfall goes into the river while the other half seems to disappear.

The highest point in Washington state is a volcano covered in glaciers.

This cave holds a surprisingly colorful variety of geological oddities.

This picturesque cliffside beacon no longer calls to sailors but shines once a year in honor of a famous shipwreck.

The oldest continuously operating fish market in the United States.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

Officially named the "Loneliest Road in America," this barren stretch of Nevada road offers almost nothing but sky and open fields.

This quarter-mile tunnel under the Bluff in Pittsburgh bends at a 45-degree angle.

"The Most Boring Road in the State."

Once strictly off-limits, this lower level housing curious and priceless vehicles of the Petersen Automotive Museum is now open to the public.

A remnant of the last Ice Age, this lake is surrounded by fascinating rock formations.

The oldest continuously-operating tavern in Wisconsin used a clever loophole to serve alcohol during Prohibition.

Restaurant in Northern Wisconsin comes with a unique feature: a grassy roof covered in living goats.

Walk up a ramp through a forest for panoramic views of Lake Michigan.

Considered by many to be one of the most dangerous highways in Alaska.

Few other hotels can rival the grandeur of the Castle in the Rockies.

The only road through the heart of Glacier National Park.