Legend says this sacred tree was a gift from goddess Athena.

This mystical orb covered in strange symbols is thought to have been used in ancient Greek magical rituals.

World's largest Christmas store.

These blingy, baubled skeletons lie in glass boxes inside a baroque Bavarian church.

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

The unbelievably opulent home built for an infamous newspaperman.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

This freshwater spring fills with 10,000 gallons of water per minute.

Paths are maintained, but trees have taken over plots.

Charleston's historic city jail once held everyone from pirates to Civil War POWs.

Hell on Earth is actually a small town in Michigan where anyone can be mayor for a day.

This former charity hospital for elderly clergy houses some of Seville’s most treasured paintings.

This one-time health resort was used by aristocrats around the world.

A 16th-century Andalusian palace.

This little museum in the town where zombies were born celebrates the living dead.

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

Legend tells how a Spanish soldier disappeared from this isolated sentry box without a trace.

A magnificent waterfall nestled in the heart of the El Yunque National Forest.

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

Touching this little fossil embedded in the wall of a grand mosque-cathedral may make your wishes come true.

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.