Fortified medieval tower house with lovely roof garden.

Macabre symbols of death and mummies on display set the tone of this Italian purgatory church.

Southern Italy's spinning top village.

Natural stone arches form a walkable "cathedral" at low tide, then disappear entirely when the water returns.

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

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

The oldest giants in Catalonia are now displayed in a 14th-century Gothic church.

A beautiful but toxic fountain of mercury.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

The ruins of a bombed medieval village memorialize the destruction of the Spanish Civil War.

Stunning Roman aqueduct used for 1900 years and still standing.

This industrial area was the dumping ground for massive amounts of trash, some of which washes up as tiny bits of sea glass.

A museum dedicated to the history and exploration of both popular music and science fiction.

A beautiful final resting place for some of the noteworthy deceased.

The ancient tomb acts as a calendar that keeps perfect time.

An ancient neolithic tomb that only sees the sun twice a year.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

Northern Ireland's Brobdingnagian stepping stones.

The atmospheric road was never meant to be so creepy.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

The mummified heart of a saint lives on in this church—after a brief hiatus when it was stolen.

An old-timey peepshow allows visitors to gawk at some of the world's most freakishly large footwear.