Deep in the countryside lie the remains of one of the grandest Roman dwellings in Britain.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

One of the largest trees of its kind in California.

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

It was once the base for a series of domestic terror attacks.

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

Occult books, tarot, oddities.

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

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

A historic arboretum and non-conformist, non-denominational park cemetery.

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

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

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

The mysterious canine hides atop a drain pipe on the back of the building, some say as a sneaky shoutout to Yale.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

One Confederate statue that accurately reflects the ugliness of its subject.

This replica of the Greek structure is in the heart of Nashville.

One of 100 “Whaling Wall" murals painted in 13 different countries by a renowned marine life artist.

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

The boulder on which Alexander Hamilton laid his head as he died can still be visited on the New Jersey coast.

Hundreds of glow-in-the-dark objects light up a museum in a historic zinc mine.

Seven golden statues rise into the sky from sculptor Victor Victori's New Jersey front lawn.

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