A restored Pittsburgh house of God has been converted to a marvelous house of suds.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Week-long block party becomes a competition for the best decorated street.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

An artsy hidden staircase leads to breathtaking views of San Francisco.

Budapest's Communist-era statues, banished to the suburbs.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

At 207 feet, one of the world's longest continuous escalators.

Largest Roman Catholic church in North America.

The site of the climactic scene from the classic horror film is now a historic landmark.

There just so happens to be a court even higher than the U.S Supreme Court: a basketball court in the building itself.

Home to items never before seen by the public.

Stalin's march toward a more modern USSR flooded a monastery, leaving a unique and extravagant nautical marker, "The Flooded Belfry."