A striking symbol of the Bulgarian capital.

One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

The "Seinfeld" diner.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

Elevated freight railway turned wildly successful urban park.

Hamburg's first legal sex work is relegated to a gated street that still does not allow pedestrian women.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

Major tourist destination known for its bubbling mud-pools and hot thermal springs.

A plaque is all that remains of a lost Oxford transport hub.

Used as an example in one of the first dictionary entries for "museum" in 1706.

Regency-era excess on the English Coast.

A hidden plaque is the only reminder of the lost palace where two storied English kings were born.

This 11th century tower is said to be the oldest building in Oxford.

The fantastic charm of England's oldest botanical garden has made it a place of writerly inspiration for centuries.

The spot where three Protestant clergymen were burned at the stake during the reign of "Bloody Mary."

Hidden in plain sight, this creepy sculpture watches from above.

Home to the most complete dodo remains known - one head, and one foot.

Ancient Egyptian wigs, South American feather headdresses, a bounty of anthropological artifacts in Oxford.

This platform is now a memorial dedicated to those who were deported during the Holocaust.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

Tiny memorials honor individual victims of the Holocaust.

Blitzkrieg bop your way through Berlin's Ramones Museum.