Extreme tourism (also often referred to as shock tourism, although both concepts do not appear strictly similar) is a niche in the tourism industry involving travel to dangerous places (mountains, jungles, deserts, caves, canyons, etc.) or participation in dangerous events. Extreme tourism overlaps with extreme sport. The two share the main attraction, "adrenaline rush" caused by an element of risk, and differing mostly in the degree of engagement and professionalism.