An institution dedicated to the towering buildings that make up skylines in New York City and around the world.

Built in the 1920s, this co-op in the Bronx feels more like an Italian villa than a typical New York apartment building.

The oldest private residence in New York City.

The only subway station in the city that still makes use of gap fillers.

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

The land is home to swimming ponies and a legendary 18th-century treasure.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

Futuristic apartment blocks are the backdrop for Montreal surfers hangin' ten on the Habitat '67 standing wave.

City law dictates that this mountaintop cathedral containing the heart of a saint is to remain the tallest building in town.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

This opulent hotel has been visited by Spider-Man, Charlie's Angels, and the Ghostbusters.

The programmatic glory of LA's giant whiskey barrel building has become an upscale reminder of the city's kitschy roadside past.

This colorful statue welcomes visitors to a Barcelona park.

This home designed for chocolate magnate Antoni Amatller is an exquisite treasure-box of Catalan Modernism.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

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

The last remnants of a massive medieval wall that once encompassed the city of Berlin.

Cold war icon and onetime "hole" in the iron curtain.

This water-tower-turned-high-end-apartment building was once the site of an early Nazi concentration camp.

A restaurant and observation deck built in a unique broadcasting antenna.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

This fully restored synagogue explores the American Jewish experience along the old frontier.

The site of a defunct mill, that once supplied marble for the construction of the Lincoln Memorial.