A King Kong-like gorilla hangs from the top of this commercial building in Tokyo.

On a small Puerto Rican island, banks of secret naval bunkers lie abandoned and filled with piles of office equipment.

The world's brightest bioluminescent bay.

This colorful gate stands as an entrance to the walled city of Old San Juan.

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

This chapel on a cliff is renowned for its healing powers and was founded on the site of a supposed divine intervention.

These relics of the city's past now exist as a prominent modern feature.

In the middle of a Vienna square, Roman ruins dating back some 2,000 years are on display.

An exquisite Baroque church in Vienna's old town.

Baroque celebration of the end of the Great Plague of Vienna.

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.

This abandoned coliseum was intended to be a grand Nazi rallying ground before it was halted at the end of the war.

This riverside restaurant has been serving customers since 1146.

A public urinal so pretty, it was declared a national monument.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

The attic of a four-century-old canal house hides a clandestine church.

Museum preserving torture methods from the past.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

This surreal statue brings a famous French novel about a supernatural cad to arresting life.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

Indents in the pavement are all that remain from a grisly death machine in Paris.