Megachurch turned Catholic church comprised of 10,000 glass panes.

A gigantic teapot sitting on top of a parking garage in the center of Utrecht.

This striking arch, one of the first architectural elements constructed in Prospect Park, was recently restored to its original glory.

This elaborate tunnel is the first structure composed of cast concrete in the United States.

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

The former headquarters of history's oldest megacorporation.

Amsterdam's former hotspot for public executions and dissections.

An open-air sewer system that was covered piece-by-piece over 300 years.

This statue dedicated to the story of a Flemish boy and his dog was relatively obscure in Belgium, but a cult sensation in Japan.

A beautifully preserved and hidden 16th-century alleyway, tucked behind an unassuming door.

Most prolific publishing house in the 1600s open to the public.

A man throwing a giant severed hand towers over Antwerp’s main square.

A beautifully eclectic mix of architectural styles.

This large copper bolt represents the benchmark for measuring sea levels in most of Europe.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

Known as "Toronto's Flatiron."

This whimsical fountain pays tribute to Toronto's four-legged friends.

The artwork commemorates the many ways 20th-century people perished while on the clock.

A state-of-the-art medical facility dedicated to treating beloved birds of prey.

Qatar's oldest market can trace its origins back more than a century.

The building is a gigantic piece of art inspired by the shape of a desert rose.

This 23-foot-tall bear stands amid the hustle and bustle of Hamad International Airport.

A beloved statue of a diving woman in Perth’s Swan River is frequently dressed up in costumes for special occasions.

The longest timber-piled jetty in the world has an underwater observatory.