A lush oasis full of vibrant plants and striking geometric displays.

One of the largest Roman settlements in Portugal.

An exquisite collection of fairytale conveyances that puts most car museums to shame.

This crumbling Portuguese ruin overlooks the populace it once ruled.

Dead weights honor the dead of Portugal's fishing industry.

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

Perhaps the most spectacular grotto along the Algarve coastline.

A small Portuguese cottage formed between boulders in the countryside.

An early work of the architect Álvaro Siza Vieira, these swimming pools blend into the beach.

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

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

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

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

Houses are tucked between, on, and underneath giant boulders.

Walrus skulls and narwhal bones were found here while excavating a 900-year old church.

Thousands of letters to Santa get delivered to this mailbox in Greenland.

This remote research station sits amid the second-largest ice sheet on the planet.

The world's northernmost flowers cling tenuously to life on desolate Kaffeklubben Island.

A statue in the center of Dublin dedicated to one of their favorite sons of rock & roll.

Amidst the bustling streets of Dublin, there is a hushed garden that is dedicated to "All those who gave their lives in the cause of Irish Freedom."

An 80-year-old plane tree is devouring an iron bench at Ireland's oldest law school.

This supermarket offers shoppers a window into the past alongside their groceries.

This 18th-century fort surrounded by a moat was used to store gun powder and ammunition, and now sits in the middle of a large part in Dublin.

This video store is a horror buff's dream.