A working steam clock, one of only a few in the world, located in Vancouver's Victorian Gastown.

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

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

This ancient Irish tower could easily have stood in for Rapunzel's prison.

This famous bridge twisted itself into oblivion, but not for the reason you might think.

A series of waterfalls and pools that flow through the 'Ohe'o Gulch and into the ocean.

Steepest flood safety railway in the entire world.

A rare chance to get up close and personal with a 13-mile ribbon of ice near downtown Juneau.

The seamy, underground secrets of Portland's criminal past.

The unbelievably opulent home built for an infamous newspaperman.

One of Savannah's oldest and most haunted cemeteries, featuring graves desecrated by Sherman's Union Army.

100 year tradition of fist fights, marked by marble footsteps.

Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

The highest point in Washington state is a volcano covered in glaciers.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Avoid gangster interaction while window-shopping.

Pilgrimage site for star-crossed lovers.

A massive sea stack famous for its appearance in The Goonies.

Breathtaking and huge 430 year old maps of Italy.

The most confusing clock in New York.

Statue of Lenin, from Cold War era Czechoslovakia, now in a neighborhood of Seattle.

Cold war icon and onetime "hole" in the iron curtain.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.