The U.S. Navy's last diesel-electric submarine rests half-submerged in the middle of Portland.

Tens of thousands of tiny birds swarm into one school chimney every fall.

Entering this curiosity shop is like stepping into a mad scientist's lab.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

A rare view of a preserved Victorian science museum.

This splendid Versailles-inspired mansion has the largest French-style formal gardens in North America.

These were the largest wind chimes in the world when artist Tom Van Sant created them for a California mall in 1967.

This wooden statue commemorates a man who spent nearly 40 years waving hello to the people of Laguna Beach.

Over 70 independent businesses have set up shop in this former Victorian department store.

Despite having a dome made of papier-mâché this tiny observatory has survived for over a century.

This eclectic antique shop is home to the taxidermy remains of a celebrity lion named Simba.

The castle still holds traces of the abandoned Roman fort it was built atop.

Recently restored menagerie of Victorian-era beasts.

This church is said to have connections to the Knights Templars.

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.

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

Berlin's old airport.

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

There's an exclusive Beefeaters pub hidden in the Tower of London.

This long-hidden space above Westminster Abbey now displays the battle gear of the legendary King Henry V.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.