Why the Las Vegas strip Nightscape is special
The Las Vegas strip becomes one of the most dazzling scenes on earth after the sun sets. Lights blaze. Energy quickens. Big rollers gamble. Top entertainers perform. All this takes place along a 5 kilometer (3 mile) desert road lined with flashy hotel-casinos.
Yes, the Las Vegas strip night scene is artificial, ostentatious and over the top, but it's unique and eye-popping enough for every traveler to experience it at least once in their lifetime.

The other aspects of Las Vegas are not wonders
This includes the daytime Las Vegas strip, which is relatively lackluster. And, the Las Vegas downtown hotel-casino area is uninspiring anytime. Without the nighttime Las Vegas strip, the name "Las Vegas" would not be on the Top 100 list.

About the hotel-casinos
Virtually all the big hotels have their own casinos - and they compete imaginatively with one another for tourists and their gambling dollars. Allures at these casino-hotels include a Disney-esque volcano that erupts on schedule - and a full-scale pirate ship that battles another boat before sinking completely below the water with its captain.
Many Las Vegas strip casino-hotels attract tourists with extravagant floor shows, often with world-famous performers.
Some casino-hotels have extensive theme parks to appeal to the growing family market. Some have fanciful architectural facades like castles, pyramids, Mississippi showboats, and large-scale versions of the Statue of Liberty and other famous Manhattan landmarks.
The Las Vegas strip (along with Downtown Las Vegas) has about 100,000 rooms and most of the world's biggest hotels. One has over 5005 rooms, making it the world's largest hotel. Yet, sometimes Las Vegas is fully booked due to its immense popularity among gamblers, sightseers, conventioneers and trade show attendees.
There is a hotel-casino to suit every taste and pocketbook, from budget family to stylish upscale.

Interesting tidbits about 
casino psychology
Casino lighting is designed to appeal to the subconscious. The casinos install millions of bright, flashy, colorful lights outside to lure your inside and innumerable dimmer, more subtle lights inside to put you in a gambling mood.
Another ploy is locating elevators, reception desk and restaurants far away from the hotel-casino's main entrance. This forces people to walk by tempting slot machines and other gaming devices on their way to and from those destinations.
Casinos know that people gamble bigger sums and more eagerly at night. That's why casinos are windowless. It creates the illusion that its nighttime even though its midday and the sun is shining brightly outside.