Sloth rehabilitation center in the jungle of Costa Rica.

One of the largest underground systems runs under Canada's largest urban center.

Canada's oldest railway tunnel is illuminated in a rainbow of color as it passes under the streets of this small city.

An incredibly random collection of wax figures is displayed in a shopping center walkway.

Dark, eerie exhibits make for a surreal exploration of the subconscious.

The past, present, and future of Russia's signature alcohol is remembered in the world's only museum dedicated to the starchy spirit.

The oldest museum in Russia is home to a fascinating collection of nearly two million anthropological artifacts and anatomical curiosities.

Moscow's most popular cemetery includes the graves of numerous cosmonauts.

This small museum is basically a time capsule of daily life in the Soviet Union.

The tallest hotel in Europe.

Immortal combat in a Moscow museum.

One of America’s oldest and spookiest hotels, thanks to the residency of ghosts, dead presidents, and Alfred Hitchcock.

One of the last remaining covered bridges in the province of Ontario.

This extensive nuclear fallout shelter built from 42 school buses could house 500 people in its tunnels.

Lost subway station nestled beneath Toronto's busy commuter line.

A book collector's dream, this Toronto bookstore has the world's first "Biblio-Mat," a random book vending machine.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

Started nearly 100 years ago, this science experiment just keeps on going, ever so slowly.

Brisbane's manmade urban beach has enough water to fill five Olympic-sized swimming pools.

This rickety old shed hides a trove of secondhand literary treasures.

A self-funded cemetery with a long list of inhabitants.

Air-raid tunnels hidden beneath this opulent hotel provided shelter and an escape route—and one of the world's longest slides.

Morocco's Argania trees are infested with nut-hungry goats.

One of the most spectacular canyons in the world.