One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

The walls and ceilings of the "Mexican Sistine Chapel" are almost completely covered with mural, sculpture, inscriptions and oil paintings.

A bed and breakfast, botanical garden, art gallery, academy, and workshop all in one.

Built 1,500 years ago, this abandoned Mesoamerican city is surrounded by a natural wall made of outstanding rock formations.

Things roll uphill on this Mexican street that seems to defy gravity.

A neo-Gothic temple in central Mexico featuring a labyrinthine network of crypts.

A museum dedicated to the Spanish occult in a town that was terrorized by the Inquisition.

A tomb in the shape of a traditional Mexican hat and shawl for the father of modern rancheras.

A unique walk through hundreds of cactus plants, including some that stretch over 8 feet tall.

This massive blockhead sculpture hides an entire library.

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

The remains of a religious colony, its amusement park, zoo, and baseball empire.

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

This semi-secret garden in south Seattle emulates a traditional Japanese garden using the plants of the Pacific Northwest.

A museum dedicated to the history and exploration of both popular music and science fiction.

Portlandia is the second-largest copper repoussé statue in the United States.

Years of archaeology, just chillin' by the water cooler.

66,000 pieces of art, donated by one of the world's richest men.

Manatees congregate around a power plant's discharge canal where the water is especially warm.

Step back into the glory days of Florida's nascent tourism industry at this Gilded Age palace.

For 32 years the famous Ringling Bros circus troupe spent winters in this sunny spot in Florida.

This Florida resort community is where the Amish come to have fun in the sun.

A lone gunner's station is all that remains of a replica Spanish Fort in Florida.

A circus legend leaves an unexpected endowment.