Climbing the "mountain of frustration" is no easy feat.

This railway-turned-greenway provides a pedestrian link in downtown Detroit and celebrates urban artwork.

Jesus' footprints and the first catacombs in the world.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.

The 25th President's marble casket can be visited in this classical Ohio tomb.

Mausoleums, astronomy, and animatronic dinosaurs at this memorial to an assassinated American president.

Marvel at this turn-of-the-century masterpiece that has been turned into a rather stately supermarket.

Unique collection containing a wide and curious range of contraceptive items.

This spectacular public market has got meat, fish, vegetables, baked goods, and enough kielbasa for a lifetime.

Prison made famous by The Shawshank Redemption has been out of commission since 1990.

The largest earthwork effigy in the world.

A network of ancient Egyptian tombs built into the cliff face along the Nile.

These Egyptian statues have survived for 3,400 years and were an acoustic wonder of the ancient world.

An ancient instrument used to measure the waters of the Nile so Egyptian farmers would know whether to expect famine or flood.

Of all the houses that grace this neighborhood, only one is a testament to surreal architecture.

A celebrated bandstand at the center of what was once the worst slum in London.

This intricately carved and hilariously huge bed was such a famous symbol both Shakespeare and Byron used it in their writing.

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

The pioneer of psychoanalysis spent the final year of his life here, still seeing patients on that famous couch.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

Mary Kelly was last seen here before she was murdered by Jack the Ripper.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.