A relic of Victorian grandeur hides beneath a busy South London road.

The world’s largest magazine collection was born from a single shelf in a teen’s bedroom.

London's smallest police station is barely the size of a phone booth.

Ride aboard a centuries-year-old steam engine and explore dozens of trains parts, including an unusual "comboose."

Get in line for Lisbon’s most famous sandwich.

Eat the ultimate iteration of Portugal's most beloved pastry.

In addition to showing films, this one-screen arthouse cinema from the late 1940s is a museum of old film equipment.

Entire apothecaries are on display at this Lisbon museum, which explores the history of medicine.

This little-known national museum houses over 40,000 works of art from across the world.

Tucked away inside this concrete building is a church and its grand display of brutalist architecture.

One man's remarkable private collection of art from around the world.

A small but charming botanical garden that contains many exotic plant species.

This unassuming chapel in Portugal plays host to a ghoulish collection of bones.

This abandoned five-star hotel is now a five-star urban exploration destination.

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

An early Portuguese serial killer's head is alarmingly well preserved in a jar at the University of Lisbon.

A garden in Lisbon filled with giant porcelain creatures.

Perhaps the most spectacular grotto along the Algarve coastline.

This gaping hole in the middle of a remote mountain lake looks like a portal to another dimension.

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

This small chapel is built of human bones and decorated with a golden skeleton.

Ring the bell to enter a bar that looks equal parts museum and old curiosity shop.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.