The final resting place for the remains of 143 Habsburg royalty.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

The beautiful baroque library of the Hapsburg empire.

Hundreds of signs pointing to the birthplaces of current Helsinki residents form stalactites on the ceiling of the cave-like Kamppi metro station.

Architecturally stunning library serves as the hub of Finnish scholarly life and culture.

This irregularly shaped sea fortress has defended not one but three different sovereign states.

A small island dotted with old, historic Finnish buildings.

A lovingly curated curio shop in which the taxidermy wear newspaper party hats, and peanut shells are spread across every surface.

A subterranean house of worship carved right out of the bedrock.

A unique work of automotive art calls this shopping center home.

An independent cinema housed in a former pathological anatomy laboratory.

A beautifully rebuilt windmill from the 17th century, situated along the Amstel River.

This collection of 20th-century toys is filled with a lifelong personal toy collection brought from the U.S. to Amsterdam.

A line number in Amsterdam that will likely never be used again due to its tragic history.

A hidden church in a hidden courtyard tells the story of the Miracle of Amsterdam.

The last of Amsterdam's original sea level markers remaining in place.

This 1920s Amsterdam neighborhood was built as a giant experiment in concrete construction.

The former headquarters of history's oldest megacorporation.

Some 80,000 Delft Blue tiles line the inside of this Amsterdam walkway.

Amsterdam's narrowest house facade is a monument to 17th-century tax evasion.

A poignant museum dedicated to the history of the Dutch resistance against Nazi occupation

The world's oldest Jewish library was founded by Sephardic Jews in 17th century Amsterdam.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

This subterranean studio is filled with fascinating kinetic art.