A masterpiece in Golden Gate Park by virtue of the artist’s debt.

Nestled in the heart of San Francisco’s bustling Financial District stands a unique homage to the Mayan and Beaux Arts.

Big gun installations, built over a massive cemetery, now abandoned & hidden in trees.

Adolph Sutro's little-known, geographically inaccurate, deprecated monument.

Tucked away in this local museum is a piece of sporting equipment that dates to the 16th-century.

A site of pagan worship which still attracts people looking for fairies.

Old-fashioned knowledge and modern engineering create the world's only rotating boatlift.

At high tide this strange footbridge appears to have no purpose whatsoever.

A once extravagant mansion, now reduced to ruin.

The heads of two giant mythological water horses honor Scotland's horselord past.

The one-time stronghold of the noble Douglas family, now home to ghost sightings and nesting birds.

The only fixed chain and post trail in Scotland snakes its way along the base of a towering seaside cliff.

Visible at low tide, this rusting vessel is one of the last surviving examples of the X-Class "Midget" submarines.

A remarkable feat of Victorian engineering across the Firth of Forth.

Journey through one of the oldest industrial sites in Scotland.

Accessible only at low tide, the deserted island is dotted with World War II ruins.

This series of Scottish caves has no clear purpose other than baffling historians.

These trenches were used to train the Scottish military for life on the frontlines of World War I.

This king penguin is a knighted brigadier of the Norwegian Army.

One of Edinburgh's oldest pubs hides a 19th-century skittles alley in the back.

This extinct volcano rises above Edinburgh and is special for its panoramic views over the city.

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

This historic pub has maintained much of its 1906 decor, including a small sequestered room for women, where orders were slipped through a tiny window.

This historic timepiece was a popular meeting place for romantic rendezvous in the 1960s.