Catacombs turned marketplace.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

An unusual round church in London with a Templar past.

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

The medieval woodcut-style artwork chronicles life in medieval London.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

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

An effigy of Vancouver's Gastown neighorhood's namesake.

This giant spider sculpture made from the iconic car is one giant visual pun.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

Common all over Japan, kōbans are small community police boxes, and now one is guarding one of L.A.’s megamalls.

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

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

A small sculpture garden that provides a microcosmic representation of California.

What began as an illegal art installation has become a symbol for unity, ocean awareness, and coastline preservation.

The oldest structure in a beachside California city was built to serve eight students.

These unusual houses look like giant boats that washed ashore on a residential street.

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

On Waikīkī Beach, a monument to four extraordinary individuals of dual male and female spirits who brought the healing arts from Tahiti to Hawai'i.

Hawai'i's oldest wooden house was shipped around Cape Horn from Boston in 1820.

These were the largest wind chimes in the world when artist Tom Van Sant created them for a California mall in 1967.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

Manhattan's deadly West Side railroad, which killed hundreds of New Yorkers, is remembered by this simple plaque.