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

The upstairs reading room is packed with millions of rare books, literary manuscripts, and historical treasures.

Continuing the tradition of the dime museum in style.

A moving memorial to the fallen and missing from WWI trenches.

The fairy tale castle of the "fairy-tale king."

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

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

Real bones which are said to have belonged to a Polish dragon.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

When it comes to handsignals (and colonialism) rock always beats scissors.

The "lovely red Vega" of the legendary record-settling pilot.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

This lavish room at NYC's French Embassy is a rare relic from the end of the Gilded Age.

Though its celestial ceiling is impressive, the true star is the vast collection of French books.

A former insane asylum despised by Nelly Bly and Charles Dickens is now fashionable apartments.

A crumbling hospital from the 1850s on Roosevelt Island.

The site of the deadly Triangle Shirtwaist Factory Fire.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

One of the last few places in Manhattan that employed a pneumatic systemic keeps it on display.

Two thousand artifacts from around the world collected by one woman who loved to travel.

The peaceful space is adorned by paintings by the famed abstract artist Mark Rothko.

An unrealized Taoist palace left abandoned in a Houston suburb.

This historical air terminal in Houston is slowly becoming an aviation museum dedicated to the city's aeronautical history.