The largest permanent Monopoly board makes one of the longest games even bigger.

A natural gas leak provides a flickering flame beneath a waterfall.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

Sandstone rock formations that look like they belong on the cover of a progressive rock album.

Visit this playground of waterfalls, caves and sinkholes.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

A half-mile long and three stories high, this bridge over the Des Moines River Valley mimics a descent into a mine shaft.

Brightly colored 30-foot-tall totems light up the desert sky just outside Las Vegas.

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

Eons old volcanic activity created one of the most stunning rock formations in the United States.

Rare recess caves fill this unbelievably beautiful Ohio park.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

Breathtakingly blue walls shimmer inside the "Glacier Behind the Town."

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

Quite simply the largest tree in the world (by volume).

Scores of vintage street lamps shine along L.A.’s Miracle Mile.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.