A small island dotted with old, historic Finnish buildings.

This irregularly shaped sea fortress has defended not one but three different sovereign states.

This endearingly discomfited urinating statue commemorates the sneaky pees had by us all.

A subterranean house of worship carved right out of the bedrock.

An alien church provides much needed silence in the midst of a Finland shopping center.

Architecturally stunning library serves as the hub of Finnish scholarly life and culture.

Lithuania's outdoor sculpture trail of wooden folk art.

A deserted Bedouin village lines the shores of this stunning desert oasis.

Early Islamic mosque with several strange conical domes.

Made famous by 'Star Wars,' these troglodyte homes face an uncertain future.

Dozens of snakes are housed and worshipped within the walls of this Vodun temple.

A burnt orange monolithic dome structure perched on a hillside near Interstate 280.

This opulent hotel has been visited by Spider-Man, Charlie's Angels, and the Ghostbusters.

Beautiful Victorian buildings from L.A.'s forgotten architectural past.

A pair of large white marble lions guard this stretch of the Mojave Desert, and it is utterly mysterious how they got there.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

Possibly the oldest church in Barcelona, this basilica has its pagan and Christian mythologies all mixed up.

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

A desert ghost town—occupied for only 12 years—was once home to more than 500 silver mines.

A stately palace has been converted into the world's largest cannabis museum.

This former Baroque palace on the historic Calle Montcada is a rare architectural gem and was once the meeting place of an aristocratic scholarly society.

Mountain where Jesus was first tempted by the Devil.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

This cemetery features modernist statues as strange as its name.