Burial grounds for more than 1,000 bodies deep under the modern town of Rabat.

After sunset the heart of Zanzibar's historic Stone Town neighborhood transforms into a culinary playground.

A roadside attraction fit for a giant.

This 1967 experiment in modular architecture was designed to be a new model for urban living.

Railways may have forged this quintet of lovely tunnels, but now they are open to hikers.

A pixel art killer whale is frozen mid-leap in this Vancouver square.

Canada's subterranean Cold War museum has doubled as a movie set.

Louise Bourgeois' 30-foot-tall steel spider sculpture.

This slumbering beast honors the Bavarian soldiers who died in Greece during a 19th-century typhoid outbreak.

Eighty million natural history specimens call this gargantuan museum home.

The atmospheric road was never meant to be so creepy.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

An emerald-green grotto just a short trip from Austin.

A beautiful geyser under environmental threat.

Quite simply the largest tree in the world (by volume).

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

When it was built in 1929, this historic bridge was the only place to cross the Colorado River for 600 miles.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

A museum dedicated to the alleged Roswell Incident.

The ghost town that ended up on Ebay.

These fantastically named natural pools look like something out of a Scottish myth.

A frozen oasis lies beneath the scorching New Mexico desert.

This replica of the Greek structure is in the heart of Nashville.