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

The magic's in the hole!

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

New York City's smallest piece of private property.

A dilapidated dock tells the story of Titanic's missed arrival.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

A unique sculpture park that specializes in the huge and bizarre.

A reservoir of vintage pinball machines and arcade games for the nostalgic and thrill seeking.

Memorial to the 137 lives lost on a ship fire, the whole hulk of which washed up on the Asbury Park shore.

Vacant Beaux-Arts buildings that serve as reminders of a beach town’s glory days.

100 massive sculptures in the Hudson River Valley.

Historic town settled in the 19th century because of its convenient location along a popular coal transport route.

A world-class collection of mechanical musical instruments and automata.

This outdoor gallery of graffiti-covered walls pays homage to the past, present, and possible future of street art.

One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”

Infamous marsh filled with toxic waste, World War II-era London rubble, and dead mobsters galore.

Four cars from the old system were once on display, but were removed in 2014.