This enormous Hindu temple in Queens serves incredible dosas in its basement canteen.

A whimsical monument deep in this park commemorates the groups that helped build it.

Located in the thermoelectric factory that once powered the entire city, this Portuguese museum is shockingly fascinating.

This charming candle shop has been in business since 1789.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

This intriguing Bronze Age artifact spent centuries hidden within a Welsh faerie hill.

The bridge is a secret gallery of discarded gum that has been transformed into miniature masterpieces.

Legend says these colorful, invasive residents are the descendants of birds released by Jimi Hendrix.

These mysterious Viking chess pieces spent centuries hidden on a remote Scottish island.

This museum inside a museum tells the story of London's timepieces.

A labyrinth hides in plain sight at each of the city's 270 Tube stations.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

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

Charles Babbage's proto-computer, painstakingly brought to life.

Claiming to be the oldest hat store in the world, this historic haberdashery had a hand (and a head) in the creation of the Bowler.

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

A clock designed to run with perfect accuracy for 10,000 years.

The curios of pharmacist and collector Henry Wellcome.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

Hidden beneath the streets of London is a secret subway that only carried mail.