Located right outside of Vienna, visitors can take in expansive views of an ethereal forest.

Double spiral staircases are not unheard of, but they are very rare.

Visitors dip into a variety of pools of what was once ice.

A hotel in Taiwan based on the better business practices that can be gleaned from Jewish law.

The world's oldest Jewish library was founded by Sephardic Jews in 17th century Amsterdam.

America's oldest Eastern European synagogue provided the immigrants of crowded Lower East Side tenements a space of sanctuary.

The pioneer of psychoanalysis spent the final year of his life here, still seeing patients on that famous couch.

Where's a guy to go after a long, hard day at work?

Murals of the wild parties once held on the frozen River Thames.

An eccentric 18th century naval officer built a ship's quarterdeck on his roof, the inspiration for Mary Poppins's "Admiral Boom."

The first tunnel to be dug beneath a river, repurposed as an art and museum space.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

The remains of an ancient Roman teenager are memorialized at the base of a modern London landmark.

Art Deco and “Wrenaissance” mash-up, this recently restored royal residence has been home to kings and comes with secret monkey passages included.

This elaborate Byzantine-style building was designed for a not-so-pretty purpose.

Residential building on the Regents Canal is a breeding ground for creativity and innovation.

This small collection of rare books was uniquely locked up for safe keeping.

Two plaques commemorate the site of Shakespeare's first theatre.

A hidden treasure in London with a rich medieval history, and the resting place of many luminaries.

This London plaque marks the spot where David Bowie's famous alien made his debut.

A makeshift shrine to the late rock star is still kept up on the nondescript façade outside 1 Logan Place.

This beautiful Victorian ironwork masterpiece was built to keep London from smelling like poop.

This artist's home turned gallery/museum preserves the creator's love of "Eastern" influences.

Public access to clean drinking water was an instant hit among the masses.