This amazing abuela became a diehard metal fan late in life and an icon of Madrid's '80s rock scene.

A pair of gigantic baby heads greet passengers at Atocha Station.

A lush indoor jungle fills this bustling Madrid transportation hub.

This funky former tobacco factory is one of the most striking examples of Madrid's cultural diversity.

The little church's beautifully frescoed ceiling has earned it the nickname “the Sistine Chapel of Madrid.”

A breathtaking and biodiverse wilderness in the mountain setting of Ernest Hemingway's "For Whom the Bell Tolls."

An ancient Egyptian temple in the middle of Madrid, Spain.

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

A rare tour of an aristocrat's private home reveals valuable 17th-century paintings from artists like Rembrandt.

This unusual elevator doesn’t stop or slow down.

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

A unique collection of gilded age mechanical pianos.

This basement museum explores the art and artistry of fascism.

Famed for its pie, this eatery has a hidden tunnel that allowed Catholics to secretly walk to church during the Reformation.

This unattributed sculpture in Amsterdam is hiding in plain sight.

This historic Amsterdam bar used to accept sailor's monkeys as payment.

Seven mini rowhouses fill the gap between 54 and 70 Westerstraat.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.