Part of an abandoned19th-century fortress hides in plain sight inside a modern office building.

A spiritual retreat in the heart of Los Angeles offers stunning gardens and a labyrinth to lose yourself in.

An unusual round church in London with a Templar past.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

A tongue-in-cheek arcade where the games are based on everyday life.

World's strongest whirlpool.

A rustic house where intellectuals and investors tried to put an end to Cold War nuclear armament.

Rent out a glass igloo to watch the Northern Lights like you live in the future.

Quality time with reindeer in the stunning scenery of their natural Lappish habitat above the Arctic Circle.

In the Hugging Tree Forest, lingonberry marshmallows, hot chocolates, and the best campfire lattes north of the Arctic Circle come to you.

A beautiful Arctic museum and nature center preserves the culture of the Sámi people.

A monument to the defenders of the Arctic in Murmansk, Russia.

The ghostly remains of what was once the world's richest copper mine.

The third version of this tall sailing ship sits, rusted and burnt, in Lake Ontario.

A preserved factory in the "Home of the Carrousel" is now a museum dedicated to the classic wooden ride.

An oasis of calm amid the chaos of the boardwalk, the museum traces the heritage of this beloved beachside amusement park.

The world's oldest bookshop still in operation.