A whale rib was used to advertise the store by the arch that offered exotic goods from far away.

Atop the former site of a historic bakery sit two stone tributes to Verona's contribution to traditional Italian baking.

There are many Byzantine-era churches still standing in Athens, but this is the only one with a 2,500-year-old column rising through its roof.

A tiny Greek Orthodox church from the Ottoman era hides on a busy city street.

The ruins of an ancient Roman tomb hidden in the basement of a trendy clothing store.

Preserved portions of Athens's ancient defenses are on display in a subterranean parking garage.

This striking sculpture of Icarus honors Greece's fallen flyers.

This Ottoman-era Greek Orthodox Church was built to honor Agia Pareskevi, a Christian saint.

An ancient site that has revealed incredible artifacts including portions of the Themistoclean Wall.

Savor sheep milk yogurt at the last of Athens' dairy bars.

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

This subterranean oyster house has been the pearl of Grand Central Station since 1913.

Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.

A unique clock tower in the garden of an elegant Victorian hall.

Look up as you explore Baku’s old town to find a monument to the local feline population.

A gigantic collection of teeny, tiny books.

A public park commemorating the iconic works of a satirist, with medieval ruins on the side.

The building's fluid, wavelike walls are a true feat of architectural ingenuity.

A unique museum dedicated to culture and artistry of carpet weaving.

This mysterious but iconic tapered tower appears in many Azeri fairytales and legends.

A museum marks and documents the site of the Titanic's launch.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

A brush maker used his factory to protect blind Jews from the Gestapo.