St Thomas was established near the confluence of the Muddy and Virgin Rivers in the 1860s and eventually became a well known stop-over between LA and Salt Lake City.
While the Hoover Dam was being built, the government purchased the entire town and relocated all the residents, including the cemetery. As Lake Mead filled, the town was abandoned and eventually covered by up to 60 ft of water. The recent decline in Lake Mead's level has re-exposed the town, and you can now wander among the remains.
If you go, be sure to download the nice pdf about the site from Lake Mead's website - there are none available at the trail head.
This hike is listed as One-Way.
When hiking several trails on a single "hike", log it with a generic name that describes the hike. Then link the trails traveled, check out the example.
WARNING! Hiking and outdoor related sports can be dangerous. Be responsible and prepare for the trip. Study the area you are entering and plan accordingly. Dress for the current and unexpected weather changes. Take plenty of water. Never go alone. Make an itinerary with your plan(s), route(s), destination(s) and expected return time. Give your itinerary to trusted family and/or friends.