Baroque celebration of the end of the Great Plague of Vienna.

Every equinox this Maya pyramid puts on a spooky ancient light show.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Along a California highway is a kind of Jurassic Park made of metal.

The ghostly remains of an accidental sea.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

A three-story, three-dimensional hobo clown in a tutu welcomes CVS shoppers.

In a city filled with Frank Gehry buildings, one stands out as one of the architect's weirder works.

A carousel trades in its classic horses and calliope for endangered species, native flora and fauna, and a modern soundtrack.

A one-of-a-kind collection of a unique medium.

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

World-famous, Pink's still manages to keep its prized cult fetish status.

A house carved into a rock in the 1940s.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

Blighted Irish field and the ruins of a 19th-century cottage on the edge of urban Manhattan.

This geothermal hot spring hides beneath a slowly growing mineral dome.

Named after a bandit and the star of several Hollywood prehistoric landscapes, these sandstone formations are a historical part of the Los Angeles natural landscape.

One of only two commuter aerial tramways in the United States.

Historic funicular railway, believed to be the shortest railroad in the world.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

The last of its kind in the country.

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

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.