A small but charming botanical garden that contains many exotic plant species.

Elaborate tile work in this railway station tells the story of Portugal.

Ancient catacombs form the foundation for this Rococo orgy of a church.

A hidden three-foot-wide house separates these two regal churches.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

The stunning interior of this Gothic church is covered in ornate gold details.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

This castle was first occupied in the 1400s and has undergone major restoration in recent times.

Attached to this castle is a local church.

The ruins of a once-grand castle that played host to a tournament with 100,000 attendees.

The ruins of this magnificent Scottish castle blend both Gothic and Renaissance architectural styles.

Once the overnight home of Mary Queen of Scots.

A cemetery in Barcelona's Poblenou district is home to this touching funerary statue, which depicts death in the form of a winged skeleton.

Stripes of human ashes cover a back lawn in the most sought-after burial grounds in Paris.

A short distance from the Eiffel Tower is the final resting place of several of the city’s more well-known and interesting characters.

The narrowest street in Paris.

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

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

This bronze statue of Martin Luther King was placed in the park without permission.

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

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

A set of seven houses, each built in a style that represents a European country.

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

In the days before house numbers, these colorful signs held clues about various buildings' purposes.