Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Five candy-colored villages on the Italian Riviera.

A massive marble foot is tucked away in a small alley near the Pantheon.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

One of several skulls claiming to belong to the beheaded St. John the Baptist is on display at this Roman church.

A working steam clock, one of only a few in the world, located in Vancouver's Victorian Gastown.

This enormous photomural pays homage to Vancouver's infamous history of public activism.

One of the largest underground systems runs under Canada's largest urban center.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

This island hill is strewn with boulders carved by shipwreck victims from the age of sail.

Still standing despite its considerable slant, this tilted lighthouse has become a local symbol of resilience.

Get a privileged view over Mexico City's Historic Center from a terrace right in its heart.

Dating back to the second century, vestiges of prehispanic mural paintings are found in this underground palace.

A graceful natural rock formation stands astride the point where the Gulf of California meets the Pacific Ocean.

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

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

New fungal and bacterial species call this deadly lake home.

Millions of years of oxidation make a drive down this winding Death Valley road surprisingly colorful.

The first life claimed by this record-breaking peak wasn't lost to exposure or a fall but rather lightning.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

The lighthouse central to the 1980s horror classic "The Fog" is, in fact, located in one of the foggiest areas of the Pacific Coast.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

One of the most elaborate displays of Jellyfish is on display at the aquarium.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.